Grainstorm APK

Version 1.4.10 -
Last updated: 2020-06-30

Realtime Sampler / Synthesizer based on Granular Synthesis

APP Information

Download Version 1.4.10 (111)
Apk Size4.60 MB
App DeveloperThe Secret Laboratory
Malware CheckTRUSTED
Install on Android4.4.x and up

Download Grainstorm 1.4.10 APK

App Description

Grainstorm is rocks,grainstorm,music,audio, content rating is Everyone (PEGI-3). This app is rated 5 by 1 users who are using this app. To know more about the company/developer, visit The Secret Laboratory website who developed it. apps can be downloaded and installed on Android 4.4.x and higher Android devices. The Latest Version of 1.4.10 Available for download. Download the app using your favorite browser and click Install to install the application. Please note that we provide both basic and pure APK files and faster download speeds than APK Mirror. This app APK has been downloaded 336+ times on store. You can also download APK and run it with the popular Android Emulators.

The best sample based granular synth for any OS

Use as/for:

- Sound design

-  Experimental musical instrument

- Fun

- An alternative to pre-recorded music.

Key Features: 

- Four tracks

- Full control over the source sound

- Infinite options to shape the grain. 

- LFOs and Envelope Followers

- Handmade effects

- Realtime Crossynthesis 

- Time Stretching, Phase Vocoding

- Supports sound files of up to seven minutes length in any audio format 

First use instructions: 

1. Press POWER. Upper right power button turns on audio engine which is TURNED OFF on startup to save battery.

2. Press EJECT. Load a sound file. 

3. Press PLAY. 

Further instructions in the menu.

Recommended Hardware:

Fast device with what Google calls a fast audio path,  which is hardware optimized for low latency audio.

Cpu needs neon extension,  otherwise it will crash.

Not recommended for low end devices. 

App ChangeLog

  • - GUI changes/cleanups
  • - Switchable new internal / external filebrowser
  • - Recording presets
  • Pro Version:
  • - Selectable output folder
  • - Optionally asks for recording filename

App Screens

Grainstorm App Screen 1Grainstorm App Screen 2Grainstorm App Screen 3Grainstorm App Screen 4Grainstorm App Screen 5Grainstorm App Screen 6Grainstorm App Screen 7


Apk scan results

Apk Scaned By TotalVirus Antivirus, Was Pure And Safe.

Scan Stats:failure:0|harmless:0|malicious:0|suspicious:0|timeout:0|type-unsupported:12|undetected:61|
Name:base.apk SHA-1:94b5e58001f2c8b9b6649660068acb06ad096271 SHA-256:ed9dc9e8f475bd32bd46c3beef8da860364eedfbee745027fce0872022507ce9 SSDEEP:98304:Je4rgJgdulibgqbKNqbKHjySjyxnjNVJ+cgoQmVQQiPqINCdC:Jelk6SKNSKm/1NVpgNmVQrSIc0 File type:Android Magic:Zip archive data, at least v2.0 to extract File size:4824014 Uncompressed Size:10621360 Contained Files :808 Contained Files By Type:MF:1,RSA:1,SF:1,css:1,dex:1,png:528,so:10,xml:242,


requires following permissions on your android device.

android.permission.MODIFY_AUDIO_SETTINGS: Allows application to modify global audio settings, such as volume and routing.
android.permission.READ_EXTERNAL_STORAGE: Allows an application to read from external storage
android.permission.RECORD_AUDIO: Allows application to access the audio record path.
android.permission.WAKE_LOCK: Allows an application to prevent the phone from going to sleep.
android.permission.WRITE_EXTERNAL_STORAGE: Allows an application to write to the SD card. Unknown permission from android reference Unknown permission from android reference
change your audio settings
Allows the app to modify global audio settings such as volume and which speaker is used for output.

read the contents of your SD card
Allows the app to read the contents of your SD card.

record audio
Allows the app to record audio with the microphone. This permission allows the app to record audio at any time without your confirmation.

prevent phone from sleeping
Allows the app to prevent the phone from going to sleep.

modify or delete the contents of your SD card
Allows the app to write to the SD card.

In-App billing
In-app Billing on Google Play provides a straightforward, simple interface for sending In-app Billing requests and managing In-app Billing transactions using Google Play.


Certificate Issuer:CN:Patrick Ropohl
Certificate Subject:CN:Patrick Ropohl


Interesting Strings

Older Versions

More Android Apps to Consider

Google Play Reviews

  1. pecos jim-avatar

    Very cool versatile app. Haven't tried pro version yet, but the free version is fun and useful. You can import audio and loops, resample and tweak the audio, lots of possibilities if you get creative with it. It's a great tool for a DAWless guitar looper stuff.

  2. Jon-Michael Jacobs-avatar

    Jon-Michael Jacobs


    Hours of creative production possibilities. Many effects and filters. Great tool for musique concrète.

  3. Scott L Wilson-avatar

    A great granular synthesizer! Love it!

  4. ken fusion-avatar

    This app is awesome . Downside of play store hounding for a review immediately after download . I was still finding my way around.(previous review, had a question) I look forward to going deep into this amazing tool for use in sound design . Thank you for your hard work , and timely response to my review .I did not expect this level of functionality on an app. I am blown away .i will re edit my review .

  5. Ess Ortijs-avatar

    This app is beautiful. The amount of flexibility and depth within it are fascinating. Ican take a simple loop and create and morphing, expansive texture with little effort. I've used it in a number of pieces and am more than pleased. I'd like some clear instructions online somewhere that I may refer to in order to access some of the deeper capabilities, but overall, I'm very happy.

  6. 077-avatar

    Why can't I clear or discard what i just did? Also, there's no such undo/redo feature in this app. It would be great if there'd been one cause then you can experiment and explore more. Hope the engineers focus a bit more on UI cause it's a great app and can be something really cool.

  7. Big Iggy-avatar

    Awesome sauce!! Especially for free! Super fun and easy to mess around with for new ideas!

  8. Csaba Kozaróczy-avatar

    Csaba Kozaróczy


    This is instant inspiration if you are into granular or glitchy stuff. I recorded myself knocking on a table w my phone's mic and turned it into sth i can vibe to by just messing around.

  9. Thomas Joseph-avatar

    This Is one of the best apps I've ever Installed! Definitely useful to experiment with any sound or track imaginable. With lots of effects, features, and options available, which I like. I hope this app stays In this store for what It's worth!

  10. Tyler Martin-avatar

    Such a cool app! Capable of very interesting textures. Remarkably powerful and full featured!

  11. Michael Fitzgerald-avatar

    Michael Fitzgerald


    This app can do a whole range of mangling, and the 4 tracks allow for some pretty deep and complex textures.

  12. Brian Stacey-avatar

    This is amazing! Brilliant! Incredible! So much fun I'm sure they'll pass a law soon. Get it while you can. Lol

  13. nikolas koskoros-avatar

    nikolas koskoros


    Dramatic discovery. Endless possibilities of sonic creation. Woefully underdocumented BUT well worth the ten million bucks worth of power at your fingertip. It will make you want to write the lost manual on your way to Xanadu.

  14. Michael Toop-avatar

    Amazing app. Loads of audio features.

  15. Larry Cushman-avatar

    When people say an app is COOL or is GREAT, it is no comparison to this app. This is the BEST app I've ever seen or used. Thankyou Grainstorm for providing me with this CREATIVE outlet my soul requires.

  16. Martijn J-avatar

    Please provide information about the update here in the playstore. BEFORE you download it.

  17. Nathan Finnegan-avatar

    Nathan Finnegan


    Awesome for recording straight into Renoise and Reason!

  18. Brian-avatar

    Very easy to loop & grunge up a sample.

  19. Kris Dubenic-avatar

    This app is essential for any ambient/noise musician. I've been using the pro version for over 1 year and it has allowed me to make some serious tracks while travelling/not in the studio. It can turn anything into an endlessly evolving ethereal dream or your worst nightmare. I still haven't tapped into the vast power and possibility inherent in this program. The highest recommendation to those considering it and a hearfelt thanks to the developers for making such an amazing app.

  20. ঊ eggo.-avatar

    The interface is incredibly confusing and hardly anything makes sense. I couldn't play any sounds that I uploaded. Nothing was clear. EDIT: I appreciate the feedback and actually acting upon it, very uncommon to see. I'm trying the app again and I like it.

  21. Kris Amphlett-avatar

    Great work! I only used it for 10 minutes and I could already work out what the controls were. It would be really handy if there was a way to be able.e to view the waveform and scanning while adjusting parameters... unless the parameters have midi compatibility? Either way, very interesting and worth getting of your into granular synthesis and sound design, or just want to make weird and wonderful sounds!

  22. km c-avatar

    Makes cool sounds but its very hard to understand (what's actually happening) even as a music producer with experience of synthesis. Also, glitchy sometimes and hard to use controls precicily. Also no way to export or record in app?

  23. John Gregory-avatar

    This app is a ton of fun for creating experimental tonality. Don't expect anything that's going to be easily loopable but do you expect to have a great time making noise. I'm anxious to plug it in and do some recording! I would love to have a version of this that I can pay for it that's a little bit more expansive with features (easy MIDI looping, a sequencer, etc. .) but I'm excited to have a new toy to play with. If the developers would like any feedback I would love to make some suggestions...

  24. ed willow-avatar

    My fav app for experimenting with sound

  25. Rožinis Ežukas-avatar

    Rožinis Ežukas


    Just what I was looking for! Perfect for my spooky soundscapes. Instructions are clear, but it's not a beginner friendly tutorial (it can be a problem for some users). Just one question - could it be updated to record selected track outputs separatley or it would be too demanding for a phone? (Samsung note 10+) Need to test it with a midi device before purchase

  26. Nate Buker-avatar

    Completely unresponsive after installing and starting up. Stunning disappointment.

  27. ola wikström-avatar

    Some weird bugs has appeared since the last two updates.. 1) can't import m4a files or some mp3/wav files anymore. The app says "invalid data found when processing input".. 2) when importing mp3-files(the ones that I'm actually able to open) the app changes playback speed to what sounds like 0.5 speed. The sound is also heavily distorted. So far I haven't been able to use the app since these errors started occurring, hope they get fixed in some way. Cause I looooooove the app. And I miss it

  28. Iason Chaloulos-avatar

    Iason Chaloulos


    how can you export the processed audio file? Nice app

  29. Sach Motee-avatar

    don't often do this but this is a genuinely great synth for android. spend some time with it and it rewards. I had the free version and was so impressed I've bought the jenkin version. Would love to be able to use this live, on the fly with a mike/instrument

  30. Joe La Sac-avatar

    As a dabbler in music production, this app is sweet! Records up to 4 tracks. Find the "sweet spot" with speed, pitch, and low latency granular modulations that allow you to morph the audios into amazing experiments.

  31. Al Yeska-avatar

    I wish I were knowledgeable enough to like it more. There is no friendliness in this app for the naive. Nor is the browser easy to navigate, in it's root depth. I lost my place and can no longer find waves to load. Perhaps, one day, small sample packs could become available to download?

  32. Kylie M-avatar

    Cool app but how do you save anything you've made into a new file of its own? It's so confusing.

  33. Anders Lund Olsen-avatar

    Anders Lund Olsen


    This is a lot of fun. When I stream the sound to my amplifier, I can hear it in full quality, with a little delay. Awesome! I will by "pro" later, just to support the project.

  34. bobby greene-avatar

    i Love it theres nothing comes close to for catching electronic voice phenomena .im not joking but I have had entire conversations with many dead relatives and other trapped spirits and several demons it May not have been designed for it but that's what I have been using it for and it works great

  35. Michael Jenkins-avatar

    Michael Jenkins


    Profoundly astounding granular synthesis app, very easy to figure out for anyone with an open mind and an appreciation for lovely oddities like this. Having years of experience in sampling and sythesisers did help but having none would get some pretty good results also

  36. A Binder-avatar

    Really nice app with so many possibilities, and thats only in the free version. good for making brutal noises, ambient vaporwave tracks, cool loops, etc etc etc Pretty easy to learn and relatively intuitive if youre familiar with synths.

  37. Michael Drosselmeyer-avatar

    Michael Drosselmeyer


    Powerful, endlessly intriguing application. Definitely one of the best synth apps I've ever had the pleasure to experiment with.

  38. Nils T. Burmeister-avatar

    Nils T. Burmeister


    Hey there. very nice tool. makes so much fun to experiment. is there any possibility to record without using an audio interface on my computer and connect my smartphone to it?

  39. Andreas Hamre-avatar

    this app activates your mic twice a day in the background even if you're not using the app. I see you claim this is not true in another review so I'll be happy to provide you screenshots of my permissions log.

  40. Mistsofnowh3r3-avatar

    Really neat, easy to use and makes great ambient sound.

  41. michael cordedda-avatar

    michael cordedda


    one of the best granular synths let alone apps ive played around with, really easy to get cool results!

  42. Althepsyphros-avatar

    Absolutely profoundly atrocious instructions. Worst instructions I have ever read in my entire synth using career. I still cant figure out what half of the knobs are actually doing.

  43. J McLain-avatar

    Great great app that you can make so many on the go soundscapes with.

  44. Romyn Ruggieri-avatar

    This is an extremely powerfull app! absolutely love it! would love to know how i could record my creations into a library though

  45. Rory Reinschmidt-avatar

    Rory Reinschmidt


    Even after uninstall continues to use microphone sporadically. What is going on?

  46. Elina K-avatar

    An awesome and very powerfull tool for multilayer sample design.

  47. Ania Sobczyńska-avatar

    Ania Sobczyńska


    takes a while to figure out (still no idea how i can record my "masterpiece" into a file) but it's fun as hell

  48. Myk Dubz-avatar

    the only thing i have to complain about is that i can't close it. it will run in background for all time...

  49. MEF-avatar

    I'm so glad I bought this app a year or so ago. The new updates are nice as well! Much thanks dev!

  50. A Google user-avatar

    Turns on my microphone without my permission, had to uninstall it. Too bad, it was cool app.

  51. James Hill-avatar

    NOTHING works. not even the hundreds of different power buttons. Nice app icon =/= nice app

  52. ex alpha-avatar

    Very capable! // MIDI support ! Great, thx.

  53. Олег Иванов-avatar

    Олег Иванов


    Great app for experimental music and for fun

  54. little bubble-avatar

    Excellent. Bought the full version and I'm not disappointed. I would love to get in contact with whoever made this app. Endless possibilities!

  55. A Google user-avatar

    perfect for on the fly noise rock

  56. griffin gibson-avatar

    Very unique and thorough

  57. Jasper Meckelborg-avatar

    Jasper Meckelborg



  58. wilunki Will-avatar

    amazing work of art and music

  59. Russian AK47 The Terrible SDRVNAUTTP-avatar

    Russian AK47 The Terrible SDRVNAUTTP


    It's using BitCrusher.

  60. Cheap skate-avatar

    ummm, so unintuitive it is incomprihensable

  61. David Webb-avatar

    For mutating sounds yes

  62. Randel Bohlke-avatar

    It must take a much smarter man than I to run this app.

  63. Annabelle Johnson-avatar

    Annabelle Johnson


    There are better synths available and the developer clearly has an inferiority complex because they can't take any critical reviews without attacking the reviewer, it's pretty pathetic.

  64. Jack Hartman-avatar

    Re-add awin and swin, please, they were amazing, and now they're gone.

  65. Dibyendu Das-avatar

    How to save projects

  66. Hayden Ruffo-avatar

    A granular Synth with all the trimmings

  67. Sylo-avatar

    This is amazing

  68. A Google user-avatar


  69. Miko Wang-avatar

    This is great but i can't find how to save the project

  70. Vineeth Jayan-avatar


  71. Michael Gagne-avatar


  72. Ian Clay-avatar

    Brilliant fun

  73. Jimmy Jackfunk-avatar


  74. Poppin SaOne-avatar


  75. Ziggy Lever-avatar


  76. Steve Meiers-avatar

    I LOVE IT! What sort of sick, twisted mind does this? ... Makes this?... Listens to this? It's so freakishly cool! If you've got a lifetime to waste tweaking virtual knobs and reshaping samples, you will absolutely love this, and never find all the of the possibilities. Gorgeously twisted sonic experimentation with loads of weird science for your darkest moments. If you tweak audio, try this.

  77. Aidan Morphis-avatar


  78. 13lood cr6sxnt-avatar


  79. Jonathan Badness-avatar

    Jonathan Badness


    thank you so much for the midi support. makes this app probably the most unique and useable android music app out there. i cant think of any piece of hardware that does anything like this. now i can link it to my samplers it will be of constant use to me. nice one

  80. Shaun Tuck-avatar


  81. Daily Driver-avatar


  82. Jer Nej-avatar

    (Edit: excellent update, double tap to go back to default is perfect!) Amazing. Even free version. Perfect for quick fix while commuting or go deep while in studio/home. And it keeps being updated. GUI is very minimal which I love - it is a bit cluttered but with so many features that's a normal compromise. Anyhow, really really good stuff here.

  83. Liuong-avatar

    This app is amazing for quick sound design..I just bought unlocker today but it doesn't want to load saves them but on load it does nothing..Am i doing something wrong or your app have a bug ? Im using galaxy edge 7..Please help..

  84. Karmagally-avatar

    Powerful manipulator, it can explore so many aspects of sound and capable to destroy completely the original sample, developers made a huge work in details, i really apreciated your work here :)

  85. A Google user-avatar

    When people get on my nerves I load up grainstorm and summons the devil. I think they run away. This rocks

  86. Brian Showalter-avatar

    Brian Showalter


    Fantastic! Will test midi later. If its a clean button assignment, this is going to be ridiculously fun AND useful.

  87. AudioMonk-avatar

    Won't I be able to save my edited sounds in free version?

  88. Vincenzo E. Marino-avatar

    Vincenzo E. Marino


    Awesome... You just need enough IQ to activate the power button of an interface before attempting to press it's buttons

  89. A Google user-avatar

    I make industrial metal, this app fits my musical needs perfectly💜!!!!

  90. imagiro-avatar

    seem really good but literally none of the buttons work, I click them and I can't get anything on the synth page to do anything :/

  91. Brian Sorahan-avatar

    Seems like a very good implementation of granular synthesis. Lots of sonic possibilities

  92. sameer uddin-avatar

    It is a fantastic granular engine . Very high fidelity and at par with some really expensive grain synths !

  93. A Google user-avatar

    an amazing tool for synthesizing recordings. 5/5

  94. phoe arizgmes-avatar

    Had fun

  95. ̷ ̴ ̸ɢ̸ʟ̶ɪ̸ᴛ̶ᴄ̶ʜ̷ ̶ ̶-avatar

    ̷ ̴ ̸ɢ̸ʟ̶ɪ̸ᴛ̶ᴄ̶ʜ̷ ̶ ̶



  96. A Google user-avatar

    This is an interesting noisemaker. It makes the wife quite grumpy; she has banished me to a closet. The instructions could be a little more clear. Perhaps a tutorial could be created? I haven't quite figured out how to save anything for use in a project, but maybe that's a paid feature? The effects were rather hard to find; I actually found them by accident. Overall, it's a cool app. The various controls can be a bit buggy and insensitive, and that would have to be worked out before I felt compelled to upgrade. If composing computer generated music is something that your into, this app is worth exploring. If you are an occasional hobbyist, you may find this app to be a little highly priced, and a little more in depth than you want or need, but it's still worth downloading the free version, just to check it out. Guaranteed to thoroughly annoy spouses, parents, teachers, siblings, or anyone else that's bothered by unnatural noise.

  97. Ott-avatar

    Yay! SD card support!

  98. Travis Germz-avatar

    Such an amazing app. Have spent hours experimenting and have many more hours to go.

  99. A Google user-avatar

    This turned my songs into something from my worst nightmares

  100. Joe Bloe-avatar

    Didn't know such an awesome app could exist