Grainstorm

In-app purchases
4.2
1.04K reviews
100K+
Downloads
Content rating
PEGI 3
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About this app

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

There is an In-App-Purchase which among other things lets you record the output. Please consider the free version as a demo version.
Updated on
Dec 10, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.2
1.04K reviews
Andrew Culp
March 16, 2024
I probably use Grainstorm everyday. It is one of the most sophisticated but truly enjoyable experiences I've had making music on Android. The interface is easy to navigate and midi implementation is excellent. There is a very large learning curve which, even after years, I'm still climbing. That said, I cannot rate this app highly enough. It is a truly remarkable achievement and worth your time and $. Grainstorm is a versatile tool, a creative playland and only limited by your own curiosity.
3 people found this review helpful
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Romi Caillé
February 5, 2024
Great app, provide ways to create and mangle sounds in huge depth. The paid version is worth it, but the free version is huge too, developer is still maintaining the app. It is limited in many ways, quite cryptic at first, and the manual could be better, but if this doesn't throw you off this is such an essential experimentation tool There are frequent glitches when recording audio, and it lacks is actual BPM settings and m4a compatibility
2 people found this review helpful
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Jonathan Rajavuori
March 20, 2022
This app is an unpolished gem. Lots of great ideas and easy to get good sounds out of. Several of its time seek controls (speed + grain position) lead to very metallic sounds, indicating DSP issues. The rotary controls are unintuitive, not following the de facto standard most music software has landed on for vertical scrubbing. Output gain is too easy to slam. Aside from several issues like this it's one of the better granular synths available here, and definitely worth a try.
25 people found this review helpful
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What's new

- Bugfixes
- Various UI enhancements like smoother scrolling of lists, faster direct parameter input, etc.
- Enhanced performance, less xruns with higher load
- LFOs now can have multiple targets
- Smoother effect loading/unloading
- Effect order can now be changed from Active Effects screen by drag and drop
- Four slots for saving/restoring state of the sequencer
Upgrade:
- Saving/Restoring of the whole project
- Modal as mono effect
- 3-Band Compressor