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Grainstorm

The Secret Laboratory Music & Audio In-app purchases

Sampler / Looper/ Synthesizer based on Granular Synthesis

Rating
4.6
1.1K ratings
Downloads
238K+
on Google Play
Price
Free
In-app purchases
Updated
May 26
2026 · v1.9.5
Get it onGoogle Play See alternatives

Screenshots

  • Grainstorm screenshot 1
  • Grainstorm screenshot 2
  • Grainstorm screenshot 3
  • Grainstorm screenshot 4
  • Grainstorm screenshot 5
  • Grainstorm screenshot 6
  • Grainstorm screenshot 7

About Grainstorm

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/instructions.html

Recommended device specifications:
• ARMv8 CPU
• 2GB+ RAM
• Android 10+
It is not recommended for low end devices.

What’s new

Version 1.9.5 · Updated May 26, 2026

- Fixed MIDI Learning: Resolved an issue where MIDI learning would stop responding after mapping a single parameter. - Fixed ENV CYCLES parameter

User reviews

Lauri Nārep
Lauri Nārep
very cool!
Comrade Pingu
Comrade Pingu
You have no idea how happy I am to be able to use this app again; it's a fully featured granular synth for 10% of the price—there's no way to go wrong with that.
Rxb Kristxn
Rxb Kristxn
great app! please please please drop an update that allows midi to control pitch
intox cooper
intox cooper
Just perfect. Soon i will buy it. Thank you for PayPal 😘
Jeff Portwood
Jeff Portwood
Worth the price
Kevin Eaton
Kevin Eaton
I believe i have fallen in love. I have found nothing even close in the app store

Frequently asked questions

What can Grainstorm be used for?
Grainstorm can be used as a tool for sound design, an experimental musical instrument, or just for fun.
What are the key features of Grainstorm?
The key features of Grainstorm include being fast and lightweight, having four tracks, stereo mode, the ability to load sound files of up to seven minutes in any audio format, and various effects like Convolution Reverb, Channel Vocoder, and Phase Vocoder.
How do I use Grainstorm for the first time?
To use Grainstorm for the first time, follow these instructions:
Where can I find the manual for Grainstorm?
You can find the manual for Grainstorm at this link: https://grainstorm.rocks.me/instructions.html
What are the recommended device specifications for using Grainstorm?
The recommended device specifications for using Grainstorm are having an ARMv8 CPU, 2GB or more RAM, and running on Android 10 or higher. It is not recommended for low-end devices.

Alternatives to Grainstorm

Looking for apps like Grainstorm? Here are 6 similar Android apps on Google Play. The highest rated is Riff Studio (4.4/5), and 5 of the 6 are free to download.

Grainstorm vs. alternatives
App Rating Price Installs Last updated Compare
Grainstorm 4.6 / 5 Free 100,000+ May 26, 2026
DRC - Polyphonic Synthesizer 4.4 / 5 Free 500,000+ Oct 13, 2026 Compare
Digitron Synthesizer – Free 50,000+ Oct 8, 2026 Compare
Roland Zenbeats Music Creation 3.8 / 5 Free 500,000+ Jun 2, 2025 Compare
Caustic 3 4.3 / 5 Free 1,000,000+ Feb 1, 2017 Compare
Riff Studio 4.4 / 5 Free 500,000+ Sep 23, 2026 Compare
Cubasis 3 - DAW & Studio App 4.2 / 5 14.99 USD 50,000+ Aug 28, 2026 Compare

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