FRMS - Granular Synthesizer

FRMS - Granular Synthesizer

4-layer granular with FM

279 ratings
121 reviews
$10.90
In-App Purchases

Details

  • Released
  • Updated
  • March 23, 2020
  • June 12, 2026

Features

FRMS - Granular Synthesizer screenshot #1 for iPhone
FRMS - Granular Synthesizer screenshot #2 for iPhone
FRMS - Granular Synthesizer screenshot #3 for iPhone
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About

This app offers a powerful and flexible layering system for creating unique audio experiences. It blends multiple synthesis types, allowing users to craft everything from ambient soundscapes to glitchy textures. Import your own sounds or use the curated library for endless sonic exploration.

4 Synthesis Engines per voice
FM Modes & Operator Stacking
Real-Time Granulation
Deep Modulation & Envelope Control
Advanced FX & Polyphony
MPE Compatibility
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What users say

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What's New in FRMS

1.13.2

June 12, 2026

- Fixed aftertouch modulation responding with a slight delay instead of immediately.

81

In-App Purchases

$10.90

Supremeja Music Preset Pack

Cinematic soundscapes for emotive scenes

Charts

Top Paid

📉 193-25

Music

This app dropped -25 positions in Music chart.

Last updated on July 15, 2026.

User reviews

Incredible sampler and synth combo...

This one is probably gonna be one of the most useful tools in a musicians toolbox, with mindboggling possibilities and beautifully complex sounds with an almost effortless worksurface. This developer delivers on this and all his other apps especially the synth ones like this and the drc.

Fantastic Synth

I love this synth because it has such a unique sound, and it works really well as an AUV3, including in BAM, which you should also check out.

MehrspurAufnahmen in Cubasis 3.8.3

Ich versuche mit diesem ios Synth als Audiounit Mehrspuraufnahmen zu machen, aber dies funktioniert nicht. Es werden zwei Audio Units von FRMS geladen, doch wenn ich das Programm schließe und wieder öffne, wird die weitere Spur nicht mehr mit dem FRMS geladen. Gibt es eine Klärung für das Problem - mit anderen iOS Synths klappt dies? Wakanoa
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A special synthsiser

This is a lovely, stable, powerful, flexible synthesiser.
Great design. Works well on phone and iPad.
The IAPs are very high quality and interesting.
My go-to granular. 5 stars for sure. Thanks. 👍🏼🎶

Wow, Klangwelten kreieren vom Feinsten

Please open the 4MB lock in FRMS so that also larger Wave files are loaded in FRMS and Parts of it can be cut and stored. FRMS has the cutting function on board from the absence. And how about an X and Y touchpad as a new feature? Would do great in FRMS. Keep it up. I think your approach to developing music apps is great.
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Response from developer

Thank you for your suggestions! We'll create a ticket for future consideration. We also appreciate your review!

Developer apps

User experience

🐞

Reported Bugs

2 issues

Crashes and audio glitches in certain DAW environments

Bug

Issues with sample playback and freezing

Bug

Requested Features

4 requests

Ability to import larger sample files

Feature

More granular control over modulation parameters

Feature

Undo/redo functionality

Feature

Improved MIDI integration and learn capabilities

Feature

FAQ

What does FRMS do?

FRMS is a versatile synthesizer app that combines Granular, FM, Additive, and Subtractive synthesis in a layering system. It allows users to create a wide range of sounds, from ambient drones to glitchy textures, by combining up to four synthesis layers per voice.

What are the key features of FRMS?

Key features include four distinct synthesis engines (Granular, FM, Additive, Subtractive) with four layers per voice, FM modes and operator stacking for complex tones, real-time granulation of samples or live audio, deep modulation and envelope control per layer, advanced effects like delay and reverb, and MPE compatibility.

How much does FRMS cost?

The app is available for free, but it offers in-app purchases. This suggests that while the core functionality may be accessible, certain advanced features, presets, or additional content might require a purchase.

Who is FRMS for?

FRMS is designed for both beginners and advanced sound designers. It's ideal for musicians and producers who want to explore complex sound creation, experiment with granular and FM synthesis, and create unique audio textures for their music.

Can I import my own sounds into FRMS?

Yes, you can import your own sounds into FRMS for granulation. The app also provides a curated sample library and the ability to capture live audio, offering flexibility in how you create your sounds.