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Rocket Player Premium Unlocker

by JRT Studio LLC
Rated: All Ages
3.4 out of 5 stars  See all reviews (83 customer reviews)

Price: $3.99
Sold by: Amazon Digital Services, Inc.
Available instantly
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Latest Updates

What's new in version 1.0.7
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Product Details

  • Release Date: March 13, 2012
  • Rated: All Ages
  • Average Customer Review: 3.4 out of 5 stars  See all reviews (83 customer reviews)
  • Amazon Best Sellers Rank: #833 Paid in Appstore for Android (See Top 100 Paid in Appstore for Android)
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Product Features

  • Gapless plyaback
  • Crossfading
  • Play Apple lossless
  • Albums marked gapless in iTunes will play gapless when used with iSyncr
  • Start/stop time from iTunes is used when used with iSyncr
  • Sync new playlists and playlist changes back to iTunes
  • Sync podcast bookmarks to and from iTunes
  • Sync song ratings to and from iTunes
  • Browse and play your music by albums, artists, genres, songs, podcasts and playlists

Product Description

Customize, manage and listen to your music library on Android. Features include: advanced audio formats, web art downloading, ten band EQ, pre-AMP, assign an EQ to item, gapless playback, variable playback speed, crossfading and Right/Left balance. Read More below!

Premium/Advanced Features:

- Advanced audio formats: Apple Lossless (alac), APE (ape), True Audio (tta), Musepack (mpc), Free Lossless Audio Codec (flac), Waveform Audio File (wav), WavePack (wv) and Windows Media Audio (less lossless and copy protected) (wma)
- 10 band graphic equalizer with bass booster
- Customized EQ presets, spoken words, loudness, small speakers and more
- Assign an equalizer preset to a song, genre, playlist, artist, album, podcast or composer
- Preamp to boost the audio volume
- Limiter to limit distortion
- Right/Left balance control
- Gapless playback to listen to the album as the artist would intend
- Variable playback speed (.5-2x) for podcasts to catch up on podcasts
- Variable playback speed (.5-2x) for music to learn new music or pick the pace up
- Read Replay gain to normalize audio values (does not calculate)
- Crossfading to fade from one song to another
- Start/stop time from iTunes when used with iSyncr for iTunes to Android
- Marked gapless albums (iTunes) will play gaplessly when used with iSyncr

When combined with iSyncr for iTunes to Android ($4.99) Rocket Player allows you to:
- Sync new playlists/playlist changes back to iTunes
- Sync podcast bookmarks to/from iTunes
- Sync song ratings to/from iTunes
- Sync video play counts

Visit for tips.

Problem or question? Please reach out to us We’d be happy to hear from you!

© 2014 JRT Studio LLC | iSyncr is a trademark of JRT Studio LLC | iTunes is a trademark of Apple Inc., registered in the U.S. and other countries.

Technical Details

  • Size: 578.6KB
  • Version: 1.0.7
  • Developed By: JRT Studio LLC (Privacy Policy Click to see complete result in a new window)
  • Minimum Operating System: Android 2.1
  • Approximate Download Time: Less than 10 seconds

Customer Reviews

3.4 out of 5 stars
3.4 out of 5 stars
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Most Helpful Customer Reviews
8 of 9 people found the following review helpful
5.0 out of 5 stars finally fixed and works great February 26, 2013
I have the Rocket premium, and the insyncr wireless. As good as music syncing gets with google/android, which is no where as good as it is with itunes, the issue is how well does the player play. And that is where the fail is for me. On my Samsung gs2, with all phone software up to latest versions, the player will start 'stuttering' the music. This happens within a song and a half and continues on. The only way to stop it is to quickly hit the power button to 'wake up' the phone, but within a couple minutes it is back to the stuttering. The people that sell this have been responsive, have sent me a beta program to try, and at this point we have exhausted all efforts, other than saying they are rewriting a new program. Since the music cannot be listened to with this problem, for the time being I am out $4 and the Rocket is unusable.

****update 3/20/2013 After a beta download, and two other updates this player finally works. Upgraded from one star because it was unusable before, it now finally works without issue on my samsung GS2. Frustrating journey, but now highly recommended.
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46 of 63 people found the following review helpful
1.0 out of 5 stars both Amazon and the app are flaky on this one. December 8, 2012
Verified Purchase
I have the big Kindle Fire, and it's pretty good. However, two really awful things about the music player provided: no equalizer, and for some reason, if I have one album with twelve songs, the provided player sets it up as twelve albums with one song. Sooooo. I went on the app store to find a music player with an equalizer.

I found the free version of this product. It's buggy. But it saw and set up my albums correctly! I had the actual 12 songs on one album. Great. So I tried the equalizer bit. It brought up a message I had to upgrade to the Premium version. Then unexpectedly, it let me change the equalizer columns. Fantastic! It sounded great! Then, when I tried to change it again, I was directed to buy the Premium version. So I did.

It didn't show up. No confirming email either. So I go back to the Amazon app store. It confirms I bought the app. It confirms it's compatible with my device. But when I try to download it, it says you already downloaded it. I check. No premium app. I go back to the app store, try downloading it again, it says no, you got it already. I start the app, it's still saying I need to get the premium version. I search the Kindle Fire. There is no premium app on my device. I go to the Amazon app store, try to download it again, it says no, you got this already. I check emails; still no confirmation. Go to app store, try to leave review.

What it tells me, YOU CAN'T COMMENT because you HAVE NOT downloaded it! Really! Really?

What can I do? I bought the app, but Amazon thinks BOTH that I bought it and downloaded it AND I did not buy it and can't comment. The fact is I bought the premium version and can't download it, and Amazon is acting crazy about it!

i really like the free version.
Read more ›
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30 of 42 people found the following review helpful
1.0 out of 5 stars Bad Unlocker April 28, 2012
Verified Purchase
Purchased the unlocker and now the app force closes before you can select an artist!! Keep the free version its still good I believe.
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2 of 2 people found the following review helpful
Verified Purchase
purchasing this extra app is great. The sound EQ is great! It has a few surprises like swiping album image to play next song. Seeing the album image much bigger is awesome. It’s like going back to vinyl record/jacket days where you can enjoy the artwork of the cover.
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1 of 1 people found the following review helpful
4.0 out of 5 stars Lots of Options October 9, 2014
Verified Purchase
The music player has very clear icons and flexibility which makes it much easier to manage in my Kindle than the one that came with it. I had no trouble finding nor playing music. Having options is what makes this worth it. Music can be selected to fade in and out, the tiempo can be slowed down or sped up, using the EQ the desired sound can be set, the graphics look good. The one down side is that upon plugging into speakers, the music automatically plays; if in pause, when switching songs once again the next songs plays. This is a challege because I use the kindle for teaching dance classes and on the road performances. If I change the song that is being cued, the next song starts playing which can be annoying. Otherwise I like the management of this app.
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3 of 4 people found the following review helpful
5.0 out of 5 stars update. It would get 5 stars February 24, 2013
By Joe
Verified Purchase
And will as soon as Amazon releases the new version which fixes the bug in the current one. In this current version there are huge ads which block the view of the album titles when using landscape as view mode.

It also would be nice if it had a volume adjust function.

The customer service is excellent.


Everything ok, app works great and I have never dealt with a better support team for any product more helpful and pleasant than the JRT folks.

There is a new version out which has been submitted to Amazon by JRT but they are dragging their feet in putting it up in the app store.

Update 2/12/2015

This player continues to get better and better and the support from JRT is nothing short of amazing. I have never had a question or issue regarding this product which has not been addressed to my satisfaction within 24 hours.

The problem I have with this app as well as other Kindle apps is actually with Amazon and I have mentioned it before. It takes them entirely to long to get the new versions up on the Amazon site so they can be downloaded. I have the latest build available on Amazon now but it is not the most recent version, that one appears in the Google Play store. It contains a fix for an album art problem I and others have had.

Kudos to the JRT team for a continuing well done job.


Amazon needs to speed up it's vetting process on these apps
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