Grainstorm APK

Version 1.4.10 -
Last updated: 2020-05-23

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 326+ 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. guest-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!

  2. guest-avatar

    Michael Fitzgerald


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

  3. guest-avatar

    My fav app for experimenting with sound

  4. guest-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

  5. guest-avatar

    Iason Chaloulos


    how can you export the processed audio file? Nice app

  6. guest-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

  7. guest-avatar

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

  8. guest-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

  9. guest-avatar

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

  10. guest-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!

  11. guest-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

  12. guest-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...

  13. guest-avatar

    Very unique and thorough

  14. guest-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.

  15. guest-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

  16. guest-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.

  17. guest-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?

  18. guest-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

  19. guest-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.

  20. guest-avatar

    Michael Drosselmeyer


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

  21. guest-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?

  22. guest-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.

  23. guest-avatar

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

  24. guest-avatar

    michael cordedda


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

  25. guest-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.

  26. guest-avatar

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

  27. guest-avatar

    Rory Reinschmidt


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

  28. guest-avatar

    An awesome and very powerfull tool for multilayer sample design.

  29. guest-avatar

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

  30. guest-avatar

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

  31. guest-avatar

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

  32. guest-avatar

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

  33. guest-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!

  34. guest-avatar

    Олег Иванов


    Great app for experimental music and for fun

  35. guest-avatar

    perfect for on the fly noise rock

  36. guest-avatar

    amazing work of art and music

  37. guest-avatar

    ummm, so unintuitive it is incomprihensable

  38. guest-avatar

    This is amazing

  39. guest-avatar

    For mutating sounds yes

  40. guest-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.

  41. guest-avatar

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

  42. guest-avatar

    How to save projects

  43. guest-avatar

    A granular Synth with all the trimmings

  44. guest-avatar


  45. guest-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.

  46. guest-avatar


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  48. guest-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.

  49. guest-avatar


  50. guest-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

  51. guest-avatar


  52. guest-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.

  53. guest-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..

  54. guest-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 :)

  55. guest-avatar

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

  56. guest-avatar

    Brian Showalter


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

  57. guest-avatar

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

  58. guest-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

  59. guest-avatar

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

  60. guest-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 :/

  61. guest-avatar

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

  62. guest-avatar

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

  63. guest-avatar

    an amazing tool for synthesizing recordings. 5/5

  64. guest-avatar

    ̷ ̴ ̸ɢ̸ʟ̶ɪ̸ᴛ̶ᴄ̶ʜ̷ ̶ ̶



  65. guest-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.

  66. guest-avatar

    Yay! SD card support!

  67. guest-avatar

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

  68. guest-avatar

    This turned my songs into something from my worst nightmares

  69. guest-avatar

    Didn't know such an awesome app could exist

  70. guest-avatar

    Grainstorm is a remarkable achievement and has the sort of depth you wouldn't expect to find in a mobile app. It has so many features and ways of manipulating your sounds that its possible uses are many and varied. It has a huge amount to offer anyone interested in sound design and/or music and will almost certainly inspire and enable you to do things that no other app I'm aware of here can.

  71. guest-avatar

    Leon van Kammen


    Its a great app. I hope they will also release a mouse-compatible version (the app does not respond to mouseclicks on my chromebook)

  72. guest-avatar

    I want to like this app but unfortunately I couldn't get any sound out of it. I'm using the free version on a Google pixel 2 xl. I started by making a recording using the microphone. I see the sound wave, but after pressing the power button in the far upper right and the power buttons for the various sections no sound comes out. I tried adjusting various settings and see the cursor scrolling over the audio file........what am I doing wrong? Is this user error or device incompatibility? I will gladly update this review if I could get it to work.

  73. guest-avatar

    Really am loving this. Would be nice if there was a way to start settings, but still very version is worth it.

  74. guest-avatar

    I like the app but my girlfriend was highly annoyed by it and broke up with me shortly after :-(

  75. guest-avatar

    Love it, very creative and rewarding however I would like the full version but currently this doesn't work. Looking forward to update

  76. guest-avatar

    soizic de st john rosse


    I love this app...i shall get the full version as soon as i can get a job and thus, a sound designer who recently broke her computer with no money to replace it, this should keep me occupied...i can't wait till i can use this in conjunction with sound grain on my pc...i shall explore this some more...Nice one team...or individual :-) I might add... Those marking it down probably don't realise that this is a synthesis tool or they just can't work out how to use someone who understands and has know how, this app is very intuitive...i shall be recommending it to my music tech pals...who are légion...if i could give it more stars ✨ i most certainly would. UPDATE 11.2.18 Bought the full version...installed...used.. Life will never be the same... You are gods

  77. guest-avatar

    Solid granular app. Probably the best out there for Android right now.

  78. guest-avatar

    Robert Callahan


    An ambitious little sound-mangling tool set, Grainstorm can work up a furious choir of squalls and bleats from a simple sampled honk. Along the way it asks the user to learn its somewhat opaque workflow. The app can chew through memory like a gang of goats, should an experiment layer too many recalculations on a mangled sound. Read the instructions, which now exist. The hide under the vertical dots, and then under another heading. Better naming and hinting of functions within the app might ease the "user experience", but certainly the introduction of instructions much improves things. That said, this will never be an instant-result app. Patience is required, but the app rewards effort. Grainstorm represents a great deal of developer work. It can give inspiring results, given a bit of user persistence. Such users should contribute, using the unlocking option. Thanks to the developer for providing the the baseline tools of the app to evaluate it without advertising debasement.

  79. guest-avatar

    Aleksandrs Masharo


    It is sick app, i made agonized sounds from hell. Love it.

  80. guest-avatar

    Highly educational app. Excellent support by the Author. Fun to play around with. Recent updates brought some very nice features. Essential tool! Edit: The interface too is fantastic, Grainstorm should be factory installed on every device! This is the kind of app that we need a sixth star for.

  81. guest-avatar

    Very cool. Once I got the hang of it I started having fun pretty quickly. I almost gave up in the beginning though, as it's not at all obvious what you're supposed to do. A quick tutorial showing the main features and maybe a suggestion to grab something with a dense waveform to start playing with (or a sample/default waveform even?) would go a long way towards making this more intuitive. It's also not initially clear what the two toggle/power symbols do or why there are two of them.

  82. guest-avatar

    Very impressive! Thanks for putting out this amazing app.

  83. guest-avatar

    Excellent for creating samples to feed into my hardware samplers.

  84. guest-avatar

    If you know sound synthesis and love granular synthesis, this app is solid way to fix your granular itch on the go. Sounds great. Lots of options to mangle whatever you record. It has a minimal intuitive design and not much in terms of instruction on where certain menus/effects are, but if you dig and explore the app, you'll be sure to be satisfied.

  85. guest-avatar

    Loved this app untill the flanger and phaser got removed....bring it back guys??!! Yes please bring it back😉😊

  86. guest-avatar

    Update 1.4.0 crashes on startup

  87. guest-avatar

    Best granular synth Ive found to date on any platform, I absolutely love it. So many options to twist and mangle audio. Easiest purchase I've ever made.

  88. guest-avatar

    Dang, it's pretty cool. I'd like to see some u-tube tutorials.

  89. guest-avatar

    Manmohan Shekhawat


    Didnt work??? Update:Thanks About Instructions

  90. guest-avatar

    Really great and easy to use granular synthesizer with lots of options for sound design. But you cant seem to save a session that you are working on only record the current sound playing, kind if kills it as a pro music app. Also would be nice to have midi support.

  91. guest-avatar

    I am really disappointed, this app sounds super cool. Unfortunately, for some reason nothing shows on the screen but a grid and the record, eject, and loop buttons. They don't do anything. I have an s6, if that matters at all.

  92. guest-avatar

    Fantastic app that allows you to layer sounds over of eachother, tweaking the speed pitch and tons of other features. Lots of depth to what sounds you can build.

  93. guest-avatar



    Wow. Crushes!

  94. guest-avatar

    Worthless Crippleware. Key features held ransom. Nothing at all without paying. Absolutely unforgivable, garbage effort.

  95. guest-avatar

    The dials don't turn properly... I got bored of trying to turn things up. I played with it for 10 mins and couldn't get it to do anything other than record a wave form, which it wouldn't play back... A lot more work needed here!

  96. guest-avatar

    This is a must have app if your even slightly into sound engineering and such with excellent developer support. Well worth purchasing the unlocker for the extra content. You'd be a fool not to! 👍

  97. guest-avatar

    Latest update now fixed issue with my phone. I know it's designed for larger screen but would be nice if it had a more user friendly way of moving around screens.

  98. guest-avatar

    Lambro P elconestharoe


    All OK. Found theme all.

  99. guest-avatar

    Cool but interface could better on tablets