1. Home
  2. 🎵 Music
  3. Rithmatic
Rithmatic: FM Synth

Rithmatic: FM Synth

FM synthesizer & AUv3 plugin

9 ratings
3 reviews
🔧 Utilities
🎵 Music
Free
In-App Purchases

Details

Released
August 7, 2026
Updated
October 31, 2026

Features

Developer

MADE WITH BEST PRACTICE LLC
✨Promote your app ✨
Rithmatic: FM Synth video #1 for iPhone
Rithmatic: FM Synth screenshot #2 for iPhone
Rithmatic: FM Synth screenshot #3 for iPhone
Rithmatic: FM Synth screenshot #4 for iPhone
Rithmatic: FM Synth screenshot #5 for iPhone
Rithmatic: FM Synth screenshot #6 for iPhone
Rithmatic: FM Synth screenshot #7 for iPhone
Rithmatic: FM Synth screenshot #8 for iPhone
Rithmatic: FM Synth screenshot #9 for iPhone
iphone
iphoneDuo
ipad
🧾$4.99 - $49.99
In-App Purchase↘︎
⭐3
Reviews↘︎
📝2+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
🎪1 happening
Events↘︎
❓8 answered
FAQ↘︎
📦~ in 2 days
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

This app is an FM synthesizer with a vast library of classic voices. It allows users to explore, learn, build, and blend sounds, and can be used as a standalone instrument or an AUv3 plugin within DAWs. It offers a visual representation of sound and a patch builder for understanding FM synthesis.

✓36,118 classic DX7 voices included
✓AUv3 plugin for DAWs
✓Patch Builder for learning FM synthesis
✓Sound blending feature
✓On-screen and MIDI keyboard support
✓Arpeggiator and latch functionality
✓WAV recording and export
Show original description
+3

What's New in Rithmatic

1.2.9

October 31, 2026

Smoother patch changes, and a free way to help. - Sound: picking a new patch while notes still ring now crossfades into it. It used to click. - Support: now and then, right after something works, Rithmatic may offer its tip jar, with a rating as a free way to help. At most once a month. In 1.2.8: - Patch Builder: all 32 algorithms can now be picked. Ten of them used to play as their neighbour. - Recording: a take now stops at 3 minutes with a notice, and is saved. A warning comes 30 seconds before. - MIDI: unplugging a keyboard now lets go of only that keyboard's notes.

More
4

Subscriptions & In-App Purchases

$4.99

Small Tip

Thanks for standing with us!

Events

Read more about An 80s Track in GarageBand
HappeningChallenge

An 80s Track in GarageBand

Play DX7 classics as a GarageBand instrument

Oct 24, 2026 — Nov 22, 2026

Read More

See All

User reviews

Most RecentHighest RatedLowest Rated

Very unique synth

I have several FM synths, and this is by far the most enjoyable to use, with a great feature set and with a great GUI as well. The AUv3 and Mac compatibility make it a standout!
HHiko303

Response from developer

Thanks so much for the kind words, glad you're enjoying it!

Wish it was an auv3

It’s great but not a plugin.😔
MCMonkey chunker

Response from developer

Update: it's a plugin now! Get the latest version and Rithmatic loads as an AUv3 instrument in GarageBand on iPad and in your DAW on the Mac. Thanks for pushing us on this :)

Exceptional sounds

Impressive synthesizer,unique and deep!
EEC0Sphere

Response from developer

Thanks so much for the kind words! Glad you're finding value in there :)

Developer apps

Static Radio Podcast Discovery
Static Radio Podcast Discovery

Indie shows, ambient & sleep

🎬 Entertainment
Free
In-App PurchasesWith Ads
Construction Calc Pro: Jobsite
Construction Calc Pro: Jobsite

Feet Inch Fraction Calculator

🔧 Utilities
Free
In-App Purchases
Demote: Universal TV Remote
Demote: Universal TV Remote

Control Roku, Samsung & LG TVs

🔧 Utilities

(1)

Free $4.99
In-App Purchases
dinky notebook: Private Notes
dinky notebook: Private Notes

Simple offline notes & journal

📊 Productivity
Free
In-App Purchases
Emojio: Emoji Music Maker
Emojio: Emoji Music Maker

Easy Song & Beat Composer

🎵 Music
Free
In-App Purchases
Spirit & Bubble Level
Spirit & Bubble Level

Digital Inclinometer & Angle

🔧 Utilities
Free $0.99
See developer apps

FAQ

What is Rithmatic?

Rithmatic is an FM synthesizer that comes with over 36,000 classic DX7 voices. It can be used as a standalone app or as an AUv3 plugin in DAWs like GarageBand on iPad or Ableton Live on Mac.

Does Rithmatic have ads?

No, Rithmatic is ad-free. The description explicitly states 'no account, no ads, nothing locked,' ensuring an uninterrupted user experience.

How many voices does Rithmatic include?

Rithmatic ships with an extensive library of 36,118 unique DX7 voices. These voices are built-in and do not require any additional downloads or network connection.

Can I use Rithmatic in my DAW?

Yes, Rithmatic functions as an AUv3 plugin for DAWs on iPad (like GarageBand) and Mac. Your Rithmatic bank appears as presets within the plugin, and key parameters can be automated.

How does Rithmatic help me learn FM synthesis?

The app features a Patch Builder that visually represents FM synthesis. You can see how operators shape sound in real-time, learn routing through algorithms, and understand the jargon with plain-language explanations.

What platforms is Rithmatic available on?

Rithmatic is supported on Mac, iPhone, and iPad. It is designed to function across these Apple devices, offering a consistent experience.

How often is Rithmatic updated?

The latest version, 1.2.9, was released on October 31, 2026. While specific update frequency isn't detailed, this indicates ongoing development and support for the application.

What is the age rating for Rithmatic?

Rithmatic has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger individuals interested in music creation.