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Fitbit One Wireless Activity Plus Sleep Tracker, Black
| Operating System | Apple_iOS, Android, Apple_iOS, Android |
| Special Feature | sleep_monitor, pedometer, fitness_tracker |
| Connectivity Technology | Bluetooth, USB |
| Wireless Communication Standard | Bluetooth |
| Battery Cell Composition | Lithium Ion |
| Shape | Rectangular |
| Screen Size | 4 Inches |
| Brand | Fitbit |
| Model Name | Fitbit One |
| Style | Modern |
About this item
- One syncs automatically and wirelessly to tablets, computers and 150 plus leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology. Syncing to computers requires Internet connection and USB port. Syncing to mobile devices requires Bluetooth and Internet connection. Syncing range: 20 feet. Call notifications via Bluetooth 4.0
- Water Resistance: Charge has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking Charge off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean.
- Warning: Do not use if you have a pacemaker or other internal, or implanted medical device. Not intended for use by children under 13. Always consult your physician. Slippery when wet
- We recommend charging your device every few days to ensure you are always tracking. Charge time: One to two hours. Battery life: up to 7 - 10 days. Battery type: Lithium-polymer
- Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the functionality, sleep tracker, and motivation of the wearable computer. They mention it's highly functional, an excellent tool to keep track of activity, and motivates them to get up and move more. Customers also like the accuracy and size. However, some customers have different opinions on the sync and durability.
AI-generated from the text of customer reviews
Customers like the product. They say it's highly functional, useful, and easy to set-up and use. Customers also mention it works seamlessly with MyFitnessPal for monitoring food intake. They say it would be a great device for PE at school combined with health classes.
"...I use a separate phone app to track my sleeping as well. The phone app is pretty amazing, but honestly, the Fitbit is rather accurate too, just in a..." Read more
"...There is also an online community that you can use, but I found it clunky and more annoying than anything...." Read more
"...So yes, it's fun, but as a tool, it's been invaluable...." Read more
"...you exactly where you are at any given time, and it works seamlessly with Myfitnesspal for monitoring your food intake, exercise, and tracking how..." Read more
Customers like the sleep tracker. They say it tracks their steps for the day, as well as the number of flights of stairs they climb. It's an excellent tool to keep track of activity and motivate them. The One seems like a great way to experiment with fitness tracking.
"...It tallies all of this for you, which can really give you a lot of information...." Read more
"...As long as the computer is on, our information stays pretty current and if we did want to push a sync to see info we can do that as well...." Read more
"...person with diabetes, it is incredibly useful to be able to very easily track what I eat and how much I exercise against blood glucose readings...." Read more
"...The Jawbone software tracks your performance over time and so does the Fitbit One-- but the Jawbone analyzes your data and makes observations-- "Hey..." Read more
Customers find the product incredibly motivating. They say it adds more activity into their day, challenges them to reach their goals, and provides plenty of useful information.
"...So it really STILL keeps me motivated. Seeing those charts and getting rewards for the first 10 flights of stairs in a day, is awesome...." Read more
"...The food menu on the dashboard has a lot of pre-measured nutritional information...." Read more
"...said, great device...does what it's supposed to do and provides plenty of useful information...." Read more
"...Up software is infinitely more useful, visually appealing and informative for me than the Fitbit One software...." Read more
Customers find the product easy to use. They mention it's convenient and adaptive. They appreciate the quick, concise information, including steps taken. They also appreciate the nice user interface for statistics.
"...The interface for food is much more intuitive and easier to use in MFP. It's also easier to put in your measurements and weight in MFP...." Read more
"...The fitbit website is great...fairly intuitive with a dashboard showing you exactly where you are at any given time, and it works seamlessly with..." Read more
"...It's simple, works reliably, and you can sync to multiple devices if you want.Wearing..." Read more
"...The device is easy to set up. The iPhone app and the PC-based Fitbit Connect program work seamlessly with the device...." Read more
Customers like the accuracy of the product. They mention it's pretty accurate on the steps taken, sleeping, and waking up at night. Some say the step tracker seems much more accurate than their iPhone's. They also mention it accurately reflects how many times they go up the stairs.
"...The phone app is pretty amazing, but honestly, the Fitbit is rather accurate too, just in a different way. I've had a couple issues with it...." Read more
"...(accurate if you calibrate it correctly for both running and walking)..." Read more
"...It is very accurate, even on a treadmill and I haven't had any problem with it tracking me while driving...." Read more
"...It's very step-oriented, so that means it's not going to accurately record your use of an elliptical machine, Pilates, weight lifting, rowing machine..." Read more
Customers like the size of the product. They say it's small, so they can discreetly wear it all the time attached to their wrists. They are also happy with the size and shape, the display, and battery life. Some mention it fits right in with their OCD and is easier to put in their measurements and weight in MFP. It feels snug and secure attached to their wrists and can customize for their own stride length, both walking and running.
"...It's also easier to put in your measurements and weight in MFP. The account is free and they work beautifully together...." Read more
"...The wristband for sleep is a good size and made well to change size for different people...." Read more
"...with a very fine Velcro-type material, making it a perfect size for men and women...." Read more
"...After wearing, it felt too tight. I returned it for a large. I have so far been very happy with the large size...." Read more
Customers have mixed opinions about the sync of the wearable computer. Some mention it syncs automatically on a regular basis, while others say it can't be synced via their Android phone when they're on the go.
"...So there are options on the website I don't use. Lastly this device syncs nicely with lots of other fitness websites so if you don't want to use the..." Read more
"...Fitbit has great directions for everything. Sometimes it gets confused about syncing...." Read more
"...I can synch it up with my computer (VERY easily) and I can log in my blood glucose and blood pressure readings for the day...." Read more
"...The fitbit one's syncing is spot on as well...any time I was within about 20 feet of my computer, the Fitbit one would sync up automatically, or I..." Read more
Customers have mixed opinions about the durability of the wearable computer. Some mention it's durable, secure, and strong enough to gently wake them from their slumber. However, others say there were some technical reliability issues and it was cheaply made.
"...is built into the holder feels like strong sprung steel, so it's pretty secure. I wear mine on my bra, but you can also wear it on your pants...." Read more
"...right away I noticed shortcomings in the form factor: The device easily comes out of the rubber sleeve/belt loop...I was at Costco carrying a box..." Read more
"...The upside of this is that the silicone is unlikely to crack, which is something several owners of the Ultra complained about...." Read more
"...There were some technical reliability issues and the company took the opportunity and almost an entire year to rework the device, refund all..." Read more
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Quick Spoiler Alert: I Love My FitBit! It's my little Jiminy Cricket Conscience, reminding me to be more active.
Fitbit is really tiny! The pictures don't show how small it is. It's smaller than my thumb. The clip that is built into the holder feels like strong sprung steel, so it's pretty secure. I wear mine on my bra, but you can also wear it on your pants. I used to have old fashioned pedometers that would come off at times, especially in the restroom when it would get jostled around a bit. If you decide to wear it on your pants, you can always get a little tether, which would be nice insurance.
When I put it back on after a shower, it says Hi! I know that's sort of silly but it still makes me smile. It's a nice, friendly touch.
I use the included wristband to wear it at night to track sleeping. The wristband is pretty comfortable, but I've had a problem with the velcro. It's not like regular velcro, and doesn't hold as well after a couple weeks. I've just sewn on stronger velcro on top of the strip and it's totally fine. Also the Fitbit has slipped out of the little pouch (which is made of thin fabric so you can read it while on your wrist if you want). I realized recently that instead of sliding it into the pouch and having the end near the opening, I turn it 90 degrees so it is parallel to my wrist and doesn't come out while I sleep.
I use a separate phone app to track my sleeping as well. The phone app is pretty amazing, but honestly, the Fitbit is rather accurate too, just in a different way. I've had a couple issues with it. If I reach over to pet my dog while I'm falling asleep, using my left hand (you wear it on your nondominant wrist), it counts the movement as actual steps. And when I am trying to fall asleep, I usually force myself to lie very still to help me relax. But I'm afraid Fitbit will think I'm actually asleep. So every few minutes I'll slightly move my arm to tell it I'm still awake. This seems to work.
One thing I've learned is I actually usually fall asleep much faster than I had realized! This was really helpful, since I have insomnia. Basically for sleep, it decides if you're asleep, restless or awake. It tallies all of this for you, which can really give you a lot of information. My app is way more complicated, but I still use it for a few of the charts. But if you need basic information, this is perfect. I'd be okay with just having the Fitbit, if I weren't such a numbers geek and into quantifying myself. :P
One more thing about sleeping, you have to tell Fitbit when you are in bed and ready to go to sleep. To do this, you just push the button for a couple seconds, until the timer starts counting. Then when you wake up, you push the button for 2 seconds again to tell it to stop. For the first little while, leave yourself a note so you get in the habit of doing it. After awhile it's no big deal at all. And if you forget, you can tell Fitbit when you were asleep, so it's pretty forgiving.
For counting steps, it's as accurate or more so than old fashioned boring old pedometers. I am quite pleased with it. Make sure to set your step length and fill out your information! My mom got one the same time I did and she didn't bother, and it was way off. It only takes a few minutes to set it up properly and the directions are pretty easy.
There are issues with stairs, though. I have a single flight of stairs down to my garden. I like to walk up and down and up again to do several flights of stairs in a row. Fitbit uses an altimeter to figure out you're going up stairs, so I guess it gets a bit confused if you go up, then down, then up, etc. The way I found around this is to add about 40 steps out into my garden at the bottom of the stairs before going back up. This works most of the time, but sometimes, alas, it doesn't count all the flights I take. It's better than a regular old pedometer though, by far! One other time it was inaccurate was when we drove up a mountain and then hiked up and down really steep trails. It thought I was going up lots of flights of stairs, which was fine. It counted my steps, but the estimation of the flights of stairs seemed way off (overestimated). You can go in and manually correct it on your log though. It's not perfect, but it's the best I've found so far. Also, driving up the mountain threw it off too. You can get an app for Android that you tell it when you're driving, and it tells Fitbit, which is handy. Get it if when you drive it thinks you're taking steps. I don't have this problem normally, but driving up steep hills seems to be an issue, easily solved with the app.
When you want to exercise during the day, you can tell Fitbit. This is helpful and makes it more accurate, so right before you start, push the button for 2 seconds to start the timer. Then push the button again for 2 seconds to stop it when you're done. Then go tell Fitbit what exercise you were doing.
There are several screens you can scroll through on the Fitbit. The last one is a flower. As you take more steps during the day, you get more leaves on the flower. It's a nice little graphic that is kind of sweet. Don't worry, guys, you won't lose your Man Card for having one of these. FitBits are so awesome. You can talk QS (Quantified Self) stats with all your friends!
To sync up your Fitbit, you put a little USB dongle in your computer and usually it syncs itself. I think it seems to sync, when you are within about 15-20 feet of the dongle, about every 20 minutes, but that's a rough guess. If you want to force it to sync (to set a silent vibration alarm, for instance- go to Settings on the web interface), you can do that. Fitbit has great directions for everything. Sometimes it gets confused about syncing. Taking the dongle out and putting it back in helps, as does forcing a sync sometimes. That has fixed it every time for me.
Now, about the web interface. You go to Fitbit.com, register to get an account, and you get a dashboard with all kinds of dials and widgets. It's pretty intuitive. The beta version is much prettier than the regular, so you can use it instead. Make sure you set up your account, settings and all that good stuff! That is how Fitbit knows how many calories you are burning, etc.
The great thing about Fitbit, and I did a lot of research before buying one, is that you can actually connect it to all kinds of different apps and other sites. Endomondo is a great one, and MyFitnessPal is invaluable. You'll see all the different ways to connect on the website when you are logged in.
If you use MyFitnessPal, which I highly recommend, you will log your food and exercise in MFP, NOT Fitbit! The interface for food is much more intuitive and easier to use in MFP. It's also easier to put in your measurements and weight in MFP. The account is free and they work beautifully together.
There is another website called FitBolt that I learned about, I think through Fitbit. It's pretty neat, but the interface is a bit buggy and requires some patience. If you work at a desk, every 40 minutes (editable), it tells you to either stretch or do an exercise. You can choose either or both. I work at home, so it's easy to do 30 seconds of plank or pushups, but I guess for some it's not practical. But the stretches are meant for people stuck to their computers. It connects to Fitbit, and after you tell FitBolt that you did the exercise they suggested, they tell FitBit and you get credit for that, and Fitbit will tell you how many calories you burned. Then MFP will tell you how many extra calories you earned! They all work together. Endomondo also works the same way. Just make sure if you log an exercise in one app that you don't then log it in another. Let them talk to each other and Fitbit will work it out.
Ok, so those are the details of how to use it. But do I like it? Do I actually use it?
You bet I do! I love it! It's very motivating. I hardly ever look at my Fitbit itself except when remembering the exact minute I start an exercise so I can log it in MFP accurately, when I then have FitBit use the timer. Mostly I have FitBit open in a tab in my browser, and MFP in another tab so that they are in my mind. It's so inspiring when I am active! And when I am really sedentary (it's so easy!), I can see that in the charts. So then I'll go do some jumping jacks or run up and down the stairs or something, anything, to get in some activity. So it really STILL keeps me motivated. Seeing those charts and getting rewards for the first 10 flights of stairs in a day, is awesome.
Oh! And there's a social aspect to it as well! You can become friends with other users and have friendly competitions to see who can take more steps in a day or week. That's really helpful for some people. I find it helpful to have a FitBit buddy.
For the price, this tiny little thing is just awesome. Yes, it sometimes gets confused, but less than a boring old pedometer that does a heck of a lot less. The sleep data is really nice, too, which is why I got the FitBit One. If you find data motivating, and want to see your progress on nice charts, get it and let it motivate you to move more.
My mom has one, as I mentioned. She doesn't use all the features (like sleep) like I do, but she also finds it motivating and will take the dog for a walk just to get in steps. She's in her late 60's and anything that keeps her active is well worth the money! And the same goes for me!
Not only did I buy one for myself, but after seeing it in use and how it could motivate a person my husband asked to get one as well so we purchased two from Amazon about a month apart. Both times this item shipped quickly with my Prime account.
I do read that some reviews say that all of the numbers are skewed and incorrect, but after reading lots of online reviews from different products of this type both on this site and on other websites NONE of these devices are 100% accurate for anyone...and anyone who says so is probably just not aware or lying to themselves or you because they are brand loyal. I've had no issues with it miscounting major steps or stairs. I did notice that it does sometimes count steep hills as stairs, but I think it works on altitude so that makes sense. And honestly, who cares...count it I worked hard to get up that steep hill count it! :0) I would be interested to find out how many stairs it counts as a flight, as I seem to rack up more flights at work than at home. I think my work staircase may be steeper or go higher than my home staircase because I always get more flights while at work than at home even if I only go up them once at work. Also it only counts going up, not down. Again that is understandable because your muscles work harder going up.
As for counting how many steps my feet take each day I clip mine every day to the inside of my bra in the gap between cleavage. I'm not sure that would work for all women, but it works perfect for me and I have never had it come unclipped and should it accidentally it would fall into my bran and I wouldn't lose it. The instructions say you can clip it to your waistband or put it in your pocket as well. I was afraid of it falling off and losing it, but I think the clip would be strong enough to keep it there with no problems. I'm just used to putting it where I do now. I liked the location so much that my husband decided he liked the location too, but being a man with no bra he got creative. We had an extra lanyard around that has a keyring that a badge clip was attached to. He took off the badge clip and now he just slides his fitbit clip onto the ring, puts it around his neck and slides it under his shirt. The shirt keeps it close to his body so it's not swinging around and still gets an accurate count. We've compared our numbers when waking around together and they are always very close, slightly off because we have different strides. He's also worn both, one clipped to his lanyard and one to his waistband and he got the same numbers on both after a walk. So we feel that him using it this way is okay.
I've also seen reports of people saying it's sensitive and picks up things like wiggling around, driving/riding in a car, etc. I've watched mine and I've not seen it add extra numbers for any of these types of activities unless I was actually moving my feet. It did count dancing if I was moving my feet and stepping around, but if I was just swaying in places or wiggling my hips/upper body it did not count any of that. I've even stood and shook the thing and if I shake hard enough I can get it to count numbers, but I had to do it pretty vigorously.
I bought it for the steps and stairs, so these are the features I use most. I did think the sleep function was interesting, I wasn't getting it for that but now that I am seeing my sleep tracked it has helped me to notice patterns where some days I might not have been sleeping enough. I like how it will still track your sleep as long as you are wearing it even if you forget to set it before you go to bed. If I forget I can just go to the app or website and tell it what time I went to bed and what time I woke up and up pops my sleeping data for that missing night.
The website was a little hard to use at first, it took some learning and just clicking on things to figure out how it worked so for people not proficient in computers they may have a hard time using it. I use the app on my iPod so I use the iPhone version, my hubby has a Samsung Tab 3 tablet so he is using the Android version. They are both different looking, but have similar functions and are pretty simple to use. There are a few things you can not do on the mobile apps that you have to log into the computer to do but it is not too much. Mostly a few setting options and setting goals are unavailable on the apps. I do like how the app will have a battery indicator you can check and the website will send you emails reminding you when it is time to charge.
These both came with dongles and I have both plugged into the computer. When I first set up the second I had to have one of the kids take mine to the other side of the apartment so that it would pick up the new one, but once that was one they are both syncing and functioning just fine on the same computer. As long as the computer is on, our information stays pretty current and if we did want to push a sync to see info we can do that as well. I can not sync mine with my iPod but it is because I have an iPod 4 and it's blue tooth connectivity is not as good as the newer devices so not the fault of this product but rather the fault of my device. My husbands however can sync just fine via blue tooth which is nice if we go on a trip and want to get updated info without carrying our dongles with us, they are small and I would be scared of loosing it!
The wristband for sleep is a good size and made well to change size for different people. We both have larger wrists and it's plenty big with a bit of room to spare. The way it is made with velcro it can easily be sized down to a smaller wrist as well so those concerned with wrist size I think would be just fine. It works on velcro and not buckles, snaps, strech, etc which is sometimes a hassle to get the sizing right on.
There are also options to track your food, calories and other exercise. I do occasionally log other exercise, but often I forget to log food, water and calories. If you are tracking calories the device itself will tell you how many calories you are burning, the website is where you would track weight, food, water intake, and exercise. You can also track some other numbers on the website if you are tracking blood sugar for diabetes, blood pressure, etc. So there are options on the website I don't use. Lastly this device syncs nicely with lots of other fitness websites so if you don't want to use the Fitbit site and trackers you can sync it to another website. It is a process however because somethings you can sync via the Fitbit site/app and others you have to go to the other websites/apps and sync through them. So it was a learning curve on that so again someone with little technology skills may have difficulty with this. Lastly you have a profile on the Fitbit website and you can make it public or private letting your friends see various things. I like having the options to make decisions on each thing. I don't mind strangers seeing how many steps I take each day, but I don't want anyone but friends seeing weight and no one cares what I ate if I was tracking food! These are all settings on the website to make certain things visible and others not. There is also an online community that you can use, but I found it clunky and more annoying than anything. Some of the other fitness websites are better so I rather just sync my info and use those.
Overall I think it was a great decision to buy these for both of us as it's increased both of our fitness. I know I can never get in as many steps as he does right now, but it still allows us to be competitive and also challenge ourselves. I know there are days that I forget it at home and multiple times I'll say things like ohhh man I'm not getting credit for these stairs today. (or walking a lot, etc.) It is also good at showing us how some days we feel very active, but are not as much as we think. And other days we feel like we didn't do much but were super active. We find ourselves parking further out just to try to get a few more steps in, or taking the stairs instead of an elevator just to get more stairs! I am really surprised by how it's changed my point of view on things!
I'm not a fitness guru, I don't have a regular workout or exercise routine, and I don't walk a bazillion steps a day. So don't think this is just for those people or the super obsessive. This is a great little device to give you that extra little motivation that might just be the difference between no activity and some activity!
Top reviews from other countries
Very disappointed with Amazon
- Escalones: Me decidí por el ONE dado que a diferencia de las otras pulseras este contaba escalones, para mi sorpresa no cuenta escalones sino Plantas subidas, al principio pense que esto no me gustaba, pero es mucho mejor así, pues por una parte los escalones pueden ser de diferentes tamaños y por otra dado que se basa en presión atmosférica y por tanto "altitud" también cuenta si estas subiendo una montaña o rampa, en resumen este punto también es positivo.
- Comodidad: El llevarlo enganchado en el cinturón es muy practico y discreto, quizá con una pulsera te olvidas más de ir cambiando de el de un pantalón a otro, pero dado que las pulseras no miden altitud sigo contento con la compra.
- Sueño: Se basa en los movimientos y es muy curioso ver esta información, con el pack que compras te viene la pulsera para atarlo cuando duermes que es muy cómoda.
- Experiencia: Si a registrar los pasos y plantas subidas le sumas anotar lo que comes con la web de fitbit... puedo asegurar que la motivación es máxima, al principio era reticente al tema de anotar lo que comía por tema de tiempo.. pero una vez lo haces te acostumbras y va muy bien, lo cierto es que no solo he bajado mucho peso si no que estoy mucho más activo ahora.
- Social: Fitbit te permite compartir retos con otros amigos que dispongan también de fitbit, por ejemplo tengo un par de amigos que cuentan pasos con Iphone y otro con fitbit, compartir los retos parece mentira pero es una motivación máxima.
- Precio: Creo que todos estos dispositivos tienen un precio un pelin elevado, no obstante la tecnología que llevan dentro es muy precisa, en algunos post de internet se les critica pero imagino que son versiones muy antiguas.. pues la preciosion la he notado muy aceptable.
- Algo negativo: Seguramente en unos años los smartphone cubrirán toda esta tecnología (pasos+escalones), pero si quieres motivarte ya HOY es un gadget muy interesante.
Acheté dans une démarche globale de perte de poids, ce petit Fitbit One - pas plus gros qu'une petite clé usb - me permet de quantifier les calories dépensées au quotidien, tout au long de la journée. On se prend vite au jeu de "faire ses pas" en empruntant des chemins nouveaux et qui rallongent un peu la distance, ou en prenant l'escalier au lieu de l'ascenseur.
Au-delà de ce côté ludique qui devient finalement vite une (bonne) habitude, il a une réelle utilité au quotidien en quantifiant les calories brûlées, ce qui permet d'ajuster ses repas en conséquent. Par exemple il s'intègre parfaitement avec myfitnesspal, qui est un peu son mirroir et permet de chiffrer assez finement son absorption de calories. De cette façon, on peut se mettre en léger déficit calorique quotidien pour perdre du poids, ou choisir de se mettre à l'équilibre pour le maintenir, sans pour autant tomber dans des excès intenables dans la durée, trop démotivants, et tout simplement mauvais pour la santé.
Je n'ai eu aucun problème non plus avec les "vraies" activités physiques réalisées en parallèle et mesurées par d'autres moyens. Par exemple les courses à pied enregistrées avec Runtastic (ou Endomondo etc...) ou les séances de natation enregistrées avec une montre Garmin Swim, viennent s'insérer tout naturellement en lieu et place des mesures du Fitbit One dans ces tranches d'utilisation, ce qui ne fausse pas les mesures, en double comptant les calories "sportives" par exemple.
Au niveau du format, je me suis longuement posé la question d'un bracelet (comme le Flex de ma femme) ou de celui-ci. Au final je suis très satisfait de ce choix. On ne fait pas plus discret, je le porte dans la poche du pantalon tout simplement. Juste une habitude à prendre au début pour ne pas l'oublier le matin. Ne portant jamais aucun "bijou" (ni gourmette, ni alliance, juste une montre "habillée" parfois) je n'aurais sans doute pas supporté très longtemps un bracelet "sport", que ca soit au niveau du confort ou de l'esthétique. De ce point de vue, chacun ses préférences. Il est aussi plus riche en fonctions qu'une Flex (altimètre pour mesurer les étages, écran...) et le fait de ne pas le porter au bras évite de compter des pas superflus en agitant les bras pendant une discussion animée par exemple. :)
J'ai eu quelques rares cas où il m'a compté des étages en trop, par exemple une fois pendant un trajet en voiture avec des tronçons très dynamiques sur route bosselée en rase campagne. Mais dans l'ensemble c'est plutôt fiable, et même s'il se plante de quelques étages un jour, c'est sans conséquence significative sur le décompte de calories.
Autonomie: un gros point fort, il tient 2-3 semaines (au moins deux fois plus longtemps qu'un Flex). En fait je l'ai rechargé une seule fois au bout de 10 jours par précaution bien qu'il affichait encore une demi-charge. 12j se sont écoulés depuis et il apparaît encore à mi-charge. Bon point car le but est bien de le porter 24/24 donc le moins il y a de maintenance, le mieux c'est.
Pour terminer, la fonction sommeil et le réveil vibrant: donne quelques indications sur la qualité de ses nuits (accessoirement permet de voir précisément à quelle(s) heure(s) bébé à pris son biberon ou ses tétées, les parents apprécieront...) et le réveil agit en douceur. J'aurais apprécié quelque-chose d'un peu plus sophistiqué comme une analyse en sommeil profond, paradoxal, etc... et pouvoir régler le réveil sur des phases de sommeil, dans une fenêtre temporelle définie, comme le font d'autres appareils. Mais c'est déjà bien pour une prise de conscience du (manque de) sommeil... :p
Au global, très satisfait de ce petit Fitbit One qui remplit parfaitement son rôle, et en toute discrétion.
Une aide réelle pour améliorer son hygiène de vie et se motiver à le faire dans la durée.
