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Grid Detective

Amazon Digital Services

1,275 ratings

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Do you have what it takes to crack the case? Grid Detective brings classic logic puzzles to Kindle.

Test your deduction skills as you try to solve 30 puzzles of varying difficulty. Each Case File starts with a brief story that describes your objective. Based on the information in the story and 6 clues, your job is to figure out which of the dozens of possible outcomes is the correct one. Using the process of elimination and deductive reasoning, you'll deduce the correct relationship between items. For example: if A=B and A<>C, then B<>C. If you can find the unique solution that matches the facts, you've solved the mystery!

Grid Detective makes it easy to solve with features that let you delete mistakes cleanly and quickly, highlight related cells on the grid and auto-populate relevant cells when you make a deduction.

A detailed tutorial and plenty of hints make it possible for everyone to enjoy testing their logical thinking against even the hardest Case File. Crack the case today with Grid Detective!

Product details

Date First Available ‏ : ‎ August 14, 2012
Manufacturer ‏ : ‎ Amazon Digital Services
ASIN ‏ : ‎ B005OR9H5S
Best Sellers Rank: #90,932 Free in Kindle Store (See Top 100 in Kindle Store)
Customer Reviews:
1,275 ratings

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1,275 global ratings

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Customers say

Customers find the logic game engaging and challenging, with puzzles progressing from easy to expert levels. The game is easy to understand and works well on Kindle Touch devices, providing a good workout for the brain and helping develop critical thinking skills. While customers consider it worth the price, they have mixed opinions about the logic difficulty, with some finding it incredibly confusing.

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Fun to play Puzzle variety Ease of use Brain exercise Quality Functionality Value for money Logic difficulty

350 customers mention "Fun to play"329 positive21 negative

Customers find the game entertaining and challenging, describing it as addictive and a good way to spend time.

"This game is frustrating, fun, time using, brain working.... I loved it! It was so much fun figuring out all the angles from just one clue! Want more!" Read more

"Great game, and perfect for helping develop logic skills and critical thinking! Plus, you can't argue with the price! A definite download." Read more

"If you like puzzles then this is a great game. The X/O mechanics take some getting used to but I enjoyed the mental exercise that the game provides...." Read more

"Fun and challanging!! I play games like this keep my mind as sharp as i can. I'm retired and enjoy trying to solve the mistery's on TV and puzzels." Read more

149 customers mention "Puzzle variety"115 positive34 negative

Customers enjoy the variety of logic puzzles in this interactive Kindle app, with three levels of difficulty that get progressively harder.

"...more than I do this one but this was a easy download load and great brain teaser." Read more

"...Great puzzles! I'm looking out for Grid Detectives 2!" Read more

"Fun logic puzzles. I love that I don't need an Internet connection to use it on my paper white. Logic seems sound." Read more

"My only qualm is that there are not enough puzzles...." Read more

138 customers mention "Ease of use"102 positive36 negative

Customers find the game easy to use and understand, with some mentioning that the early levels are particularly challenging.

"This game is a lot of fun and challenging at the same time. I play it while i wait usually at airports or during flights, it sure makes my brain work." Read more

"...I love logic puzzles! Great instructions, easy to use, interesting stories. And it is free! Hope they publish more logic puzzle programs." Read more

"Fun, but not very challenging. However, I have not yet tried the advanced levels yet. I'm using it on a Kindle Paperwhite...." Read more

"This is good for keeping the mind young and thinking. Not too hard and it doesn't take too long to solve, which is perfect for times when you just..." Read more

120 customers mention "Brain exercise"117 positive3 negative

Customers find this software provides a good workout for their brain, helping to keep it agile and improving critical thinking abilities, with one customer noting it makes them think three steps ahead.

"...Great brain exercise. I hope they come out with more editions and puzzles for this game. Very highly recommended!" Read more

"I feel so smart after finishing one of these puzzles. It's exercise for your brain. They are not too easy, yet not so hard that I got frustrated." Read more

"IT DOES MAKE YOU EXERCISE YOUR MIND AND I DO ENJOY PLAYING IT. mY PROBLEM IS MY FINGERS ARE TOO THICK" Read more

"Great mind exercise!!..." Read more

68 customers mention "Quality"65 positive3 negative

Customers praise the quality of this Kindle game, describing it as excellent and well-done.

"Very addictive. Please I want more. I love clearing the cobwebs from my brain by using my brain. Helps me be more observant and creative...." Read more

"No review neccssary. Excellent Series!" Read more

"...There are three levels of difficulty - easy, medium, and hard. It's totally addictive. The only downside is that there isn't a second edition!..." Read more

"...I wish this were an entire series. It was very well done and fun. Extremely addictive. Whoever made this, please make more!" Read more

37 customers mention "Functionality"27 positive10 negative

Customers find that the software works well, particularly on Kindle Touch devices, with good game functionality. One customer mentions it serves double duty as practice.

"...2. App is compatible with all eink Kindles. Works great on Kindle Touch. 3. Slving process works smoothly and fast enough. 4...." Read more

"Excellent game for those who enjoy logic problems. Works great on the Kindle when waiting at the tire shop, jury pool, etc." Read more

"Impossible to play on my Kindle." Read more

"The game works fine, but apparently I'm just not smart enough figure out the implied answers.. Kind of made me feel like an idiot!" Read more

35 customers mention "Value for money"33 positive2 negative

Customers find the software worth the price and appreciate that it is available for free.

"...Logic? Nope, not the kind of puzzle I usually go for. But it was free, so I decided to give it a whirl. The puzzles are fun...." Read more

"Its fun! Really challenges the mind. Plus, it's free! The x's get annoying but otherwise it's cool. Like mine sweeper except uses word clues...." Read more

"I love this logic games app and I adore the fact that it is free. I downloaded it on my paperwhite and have no complaints so far...." Read more

"...Anyways, ignore the poor reviews. This is a top-notch game ... AND FREE! Can't beat the price. Now, creators, where's your sequel?" Read more

42 customers mention "Logic difficulty"23 positive19 negative

Customers have mixed opinions about the logic difficulty of the software, with some praising its challenging puzzles while others find it incredibly confusing and difficult to understand the hints.

"Logic problems you can do on a KIndle. Solving problems on a Kindle is easy to do, although these problems are on the easy side," Read more

"clues are confusing and not easy to understand wrong answers to correct them. do not like the way the lay out is" Read more

"premise is simple, some of the relationships get a little tricky so have a pencil and paper handy- just in case you want to make a note.. these are..." Read more

"...While I finished all without using any clues, I missed the explanation that is available at the back of a logic puzzle book...." Read more

Top reviews from the United States

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R
Too few puzzles
Reviewed in the United States on May 22, 2013
Verified Purchase

My only qualm is that there are not enough puzzles. The game is one of a kind, and once it's ended, it leaves you thirsty for more, unfortunately, it's almost impossible to find anything that resemble it on all of the Internet. So...when will there be more puzzles? Can we hope for a "Grid Detective 2" or something like that? With about twice of the actual puzzle number, I would personally agree to pay for a sequel.

Impossible to find, except obviously, for the one Ed Pegg mentioned: "Who is the Engineer?" and once called "Einstein's Riddle" who goes as such:

*There are 5 houses all with a different colour, with a person of a unique nationality in each one.
*These 5 persons drink a unique drink, smoke a unique brand of cigarettes, and have a unique kind of pet.
*The question is "Who has the fish?"

CLUES
1. The British man lives in the red house.
2. The Swedish man has a dog for a pet.
3. The Danish man drinks tea.
4. The green house is to the left of the white house.
5. The owner of the green house drinks coffee.
6. The person that smokes Pall Mall has a bird.
7. The owner of the yellow house smokes Dunhill.
8. The person that lives in the middle house drinks milk.
9. The Norwegian lives in the first house.
10. The person that smokes Blend, lives next to the one that has a cat.
11. The person that has a horse lives next to the one that smokes Dunhill.
12. The one that smokes Bluemaster drinks beer.
13. The German smokes Prince.
14. The Norwegian lives next to a blue house.
15. The person that smokes Blend, has a neighbour that drinks water.

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T. Robinson
Sweet! Why is this the only one?
Reviewed in the United States on August 12, 2013
Verified Purchase
Well, I completed all 30 of the puzzles and hoped to find a bigger collection to buy, but sadly, there's nothing to be found.

The only problem I had with Grid Detective was that my big fingers had trouble selecting some of the edge squares. Fortunately, the designers were nice enough to provide arrow keys for dealing with that exact problem. From a programming perspective, this is better designed than others I have tried online. (Puzzle Baron has something for the iPad, but I don't own one of those so I can't compare.)

I actually read all the 1-star reviews. A few asked how anyone could give glowing reviews of this game. Well, compare the 1-star reviews with the 5-star. I noticed the following about the low reviews:
* A good portion of them were written by children and they can be excused from not comprehending logic puzzles
* Of the ones not written by children, the reviews were laced with "b4" or "u 2" (we speak English, not Bingo), misspellings and horrible grammar. Logic puzzles are for people who like challenging puzzles, not the crowd that whines "math is hard!"

One reviewer commented that these seemed like the story problems she so hated 30 years ago (and the comparison is likely valid). Thanks, but I liked story problems. So did everyone that I talked to with technical and creative careers, like engineers and computer programmers... you know those people? They are the ones that give you all your favorite mindless things, from Androids to iPads to Angry Birds that run on them.

Anyways, ignore the poor reviews. This is a top-notch game ... AND FREE! Can't beat the price. Now, creators, where's your sequel?

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4 people found this helpful

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Shawn
Fatal battery bug in this app
Reviewed in the United States on August 26, 2012
Verified Purchase
I love logic games and the such and this is one of the best. Plus 5 stars for that.

However, after considerable trial and error, I found out that this application drains the life out of my Kindle battery in about an hour. It will go from a full charge to 100% dead. Thinking this wasn't possible, I thought it must be a battery problem. I replaced it with a brand new, factory fresh battery. I tested it by only reading for several weeks. No problem. Played this game once (and ONLY this game) and the battery immediately went dead. Minus 4 stars for this as it makes the entire device unusable.

Too bad. It's such a well thought out game.

For due diligence's sake, I did my same test above on the other variations of this game (Holiday notably) and had the same experience.

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2 people found this helpful

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Sasssysweeet
GIVE ME MORE!!!!
Reviewed in the United States on October 1, 2011
Verified Purchase
I love these games. I remember playing these I kid. They would give them to us in school. I've always loved. I would actually pay for this if I could get one made entirely of hard ones. Please make more of these Amazon. I've finished this one and I'm going through withdrawls. If you like a challenge and the process of elimination you will love this game. You work the grid eliminating possibilities as you go until the answers are before your eyes. So much fun and a great challenge.

Update: I have this program on my kindle 3 and I love it but.... I'm about to upgrade to a kindle fire and give my K3 to my mother. Now I will lose ALL active content I've ever purchased. I think it would be great of the designers to give us a free pass when they come out with a FIRE version so we don't feel like we lost money when we switched over. :-)

*3/11/12 Hopefully someone will create this for the fire. Only thing I miss about kindle 3G is games and battery life.

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Grid Detective

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Top reviews from the United States

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5.0 out of 5 stars Too few puzzles

5.0 out of 5 stars Sweet! Why is this the only one?

1.0 out of 5 stars Fatal battery bug in this app

3.0 out of 5 stars GIVE ME MORE!!!!

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Too few puzzles

Sweet! Why is this the only one?

Fatal battery bug in this app

GIVE ME MORE!!!!