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Android Apps > Music & Audio > Grainstorm
Grainstorm icon

Grainstorm

by The Secret Laboratory · Music & Audio · Free
On Google Play since October 2013 · Data updated 2026-10-29

Grainstorm is made and published by The Secret Laboratory. AppBrain is an independent app data site and isn't affiliated with The Secret Laboratory. The app name, icon, screenshots and description belong to The Secret Laboratory and are shown as published on Google Play.

AppBrain's verdict

EstablishedLoved by users
Total installs
240 thousand
Rating on Google Play
4.50
1,083 ratings
Last updated
May 26, 2026

Grainstorm has 240 thousand installs. Users love it: 4.5 stars from 1,083 ratings.

Official page on Google Play

Pros & Cons

  • Unique granular synthesis with vocoder capabilities
  • Four-track workflow enables versatile layering
  • Lightweight, mobile-friendly performance
  • Free to start with an option to unlock recording via in-app purchase
  • Limited to four tracks compared to multi-track rivals
  • May lack MIDI/live performance features seen in some competitors
  • Free version is a demo; full features require in-app purchase

Installs

Tracked by AppBrain
Last 30 days
440
Per day
15
30-day average
Play install range
100+ thousand
Launched
October 2013

Installs over time

Grainstorm has been installed 240 thousand times. Over the past 30 days, it averaged 15 installs per day.

Rankings

Google Play top charts

Google Play Rankings for Grainstorm

This app is not ranked

Competitors

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Releases

Updates seen on Google Play
Version
1.9.5
Launched
October 2013
  • May 26, 2026UpdateVersion 1.9.5
  • May 25, 2026UpdateVersion 1.9.5
  • Apr 6, 2026UpdateVersion 1.9.5
  • Mar 30, 2026UpdateVersion 1.9.5
  • Nov 11, 2025UpdateVersion 1.9.4
Show all changes Show fewer

User feedback

Ratings and reviews on Google Play

Google Play Rating history and histogram

840
71
83
7
63

Comments on Grainstorm for Android

★★★★★ S l B · Sep 14, 2024
Very powerful app for granular synthesis and sound design. The midi control over loop playback position turns it into an experimental sampler. I would pay again for a VST version.
★★★★★ Larry Cushman · Jan 13, 2024
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. Thank you Grainstorm for providing me with this CREATIVE outlet my soul requires. Update: what happened? Came back to this app and don't even recognize it. Ease of functionality went bye-bye.
★★★★★ OptimizticPizza · Nov 9, 2022
Song: alvedon retire. On the sidebar for fx go to 4 LFO1 Target: Pitch. CPS: 20 Bound A and bound B move by .01 increments so Bound A-0.01. Bound B 0.01 Slowly push them further apart using the + & - on both You can slowly morph into scary and then back. Keep it to -0.01 and 0.01 Go to LFO2 CPS: 20 Target : Density Bound A 95. Bound B 420. Slowly lower CPS. Then raise cps back to 20 After that Set Bound A and Bound B back to 250 LFO3 Target: Read off set CPS .2 Bound A: 490 Bound B: 520 drunkFX
★☆☆☆☆ Andrew Cecka · Oct 17, 2025
Fully broken on my S25 Ultra. Freezes if I try to add any track beyond 1. Seems like it may still be the mic issue that was thought solved with the new update.
★★☆☆☆ Mark S · Sep 25, 2024
3.5 stars if it didn't start running every day for no reason using 30% of my entire days' battery capacity. Without the battery issue it's ok, unfinished and unpolished, but it does do a lot
★★☆☆☆ Allen Favrot · Mar 16, 2023
Loopspins when recorded cause the disk drive to eject.
★☆☆☆☆ Justice Bernal · Aug 25, 2022
Doesn't work on Google Pixle Chrome :-(
★☆☆☆☆ *&39;# *&39;er T'Floobius · Jan 8, 2026
Really nice looking piece of useless garbage?.. Cant get this app able to do anything useful except make sounds/music sound stupid, just a messy kids toy!, buggy as F rarely loads up without everything jumbled up and not scaled to work, Haven't these devs ever thought that users could do with some built in interactive help a tutorials?, this program does absolutely nowt!!! Time wasters.....

Technology

Found in the app by AppBrain
Ads
No ads
Price
Free
Libraries
10
App size
12.4 MB
Needs Android
6.0+
Content rating
Everyone

Technologies used by Grainstorm

12 permissions · 10 libraries
Subscribe to see full permission and library details

About the app and developer

About Grainstorm

Grainstorm is a music & audio app developed by The Secret Laboratory.

Install Statistics

Grainstorm has been downloaded 240 thousand times. In the last 30 days, the app was downloaded 440 times.

User Ratings

Grainstorm is rated 4.50 out of 5 stars. The rating is based on 1.1 thousand ratings.

App Information

Grainstorm is freely available from Google Play. The APK size is 12.42 MB. The latest APK version available is 1.9.5. The last update was on May 26, 2026.

Technical Requirements

Grainstorm requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since October 2013.

App Performance Report

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Developer information for The Secret Laboratory

The Secret Laboratory

tsl@rocks.me

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Store listing

By The Secret Laboratory, from Google Play

“Sampler / Looper/ Synthesizer based on Granular Synthesis”

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Screenshots by The Secret Laboratory, from the Google Play listing
Description by The Secret Laboratory Written by the developer, not by AppBrain. Click to read.
Use as/for:
• Tool for Sound Design
• Experimental Musical Instrument
• Fun

Key Features:
• Fast and lightweight
• Four tracks
• Stereo Mode
• Loads sound files of up to seven minutes length in any audio format
• Effects like Convolution Reverb, Channel Vocoder, Phase Vocoder

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.

A manual can be found here: https://grainstorm.rocks.me

There is an In-App-Purchase which among other things lets you record the output. Please consider the free version as a demo version.

Recent changes:
- Fixed MIDI Learning: Resolved an issue where MIDI learning would stop responding after mapping a single parameter.
- Fixed ENV CYCLES parameter
Official page on Google Play
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