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FM Synthesizer – Piano Keys

FM Synthesizer – Piano Keys

Music frequency changer

6 ratings
4 reviews
🔧 Utilities
🎵 Music
Free
In-App Purchases

Details

  • Released
  • Updated
  • April 21, 2021
  • June 29, 2026

Features

Developer

Stanislav Duplinskiy
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🧾$4.99 - $9.99
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About

Explore sound synthesis with adjustable parameters to create unique audio. Access new presets monthly, utilize multi-genre synths, and manage effect groups. Record and share your musical creations with others.

✓Adjustable synthesis parameters
✓Monthly new presets
✓Multi-genre synths
✓Effect group settings
✓Session recording
✓Share recordings
Show original description

What's New in FM Synthesizer

1.4.1

June 29, 2026

- Added a new octave, covering even more notes - Save your own custom presets - Expanded the built-in presets library - Added a recording timer for easy tracking - New, convenient preset selection screen - Add presets to your favorites - Performance optimizations - Minor bug fixes

More

Subscription plans

Pro access and monthly updates

Monthly updates of presets, fx and settings

$9.991 Month
3 Days trial
How to cancel FM Synthesizer subscription ⁉️
3

In-App Purchases

$7.99

Effects & Recording

Access effects, record your tracks and share

User reviews

Most RecentHighest RatedLowest Rated

Awful

Don’t waste your time with this one.
KennyvertKennyvert

Response from developer

Hello, Kennyvert! I’m sorry to hear the app didn’t meet your expectations. Our goal is to offer a unique FM Synthesizer experience, with versatile presets and detailed waveform controls. If there’s any specific feature or improvement you’d like to see, please feel free to share. We’re always looking to enhance the app and make it more enjoyable for users.

Cool app

I’m really enjoying this app
cool voice checking appcool voice checking app

Response from developer

Hello! Thank you for your feedback :)

Don’t believe in renting apps

And neither should you as a consumer,
zyberpunkzyberpunk

Response from developer

Hi, zyberpunk! Thank you very much for your feedback, it is important to us. We really had difficulty releasing updates and had to rewrite the engine. Everything will be ready soon. We are sorry that you had a negative experience. We are working on updates. Best regards, Castles Trip

Doesn't work

Tapping the keys does absolutely nothing. The control knobs turn, but I never got it to make a single sound. And almost everything you tap brings up a screen asking you to "subscribe". Subscribe to what? A broken app?
cholling13cholling13

Response from developer

Thank you for your feedback! We will be very grateful if you report the version of the application, the version of the axis on which you noticed this problem and the device. We will definitely check and fix this error! To contact us, we ask you to write a letter to castles.trip.spprt@gmail.com.

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FAQ

What is FM Synthesizer?

FM Synthesizer is a music app that allows users to explore sound synthesis by adjusting various parameters to create new and unique sounds. It offers multi-genre synths and effect group settings.

Does FM Synthesizer have ads?

No, FM Synthesizer does not contain advertisements. The app is free to download and use, with optional in-app purchases for additional features or content.

How often are new presets added to FM Synthesizer?

FM Synthesizer offers new presets from top sound producers every month. These updates aim to provide users with fresh sonic palettes for their creative sessions.

Can I record and share my music with FM Synthesizer?

Yes, FM Synthesizer allows you to record your creative sessions and provides the ability to share these recordings with your friends. This feature facilitates collaboration and showcasing your musical ideas.

What are the subscription options for FM Synthesizer?

FM Synthesizer offers Pro access with monthly updates through subscription plans. Options include $4.99/month or $9.99/month, both with a 3-day free trial.

What devices is FM Synthesizer compatible with?

FM Synthesizer is compatible with iPhone, iPad, and iPod devices. It is designed to run on Apple's mobile operating systems.

What is the age rating for FM Synthesizer?

FM Synthesizer has an age rating of 4+. This indicates that the content is generally suitable for young children, though parental guidance is always recommended.

When was FM Synthesizer last updated?

The latest version of FM Synthesizer, 1.4.0, was last updated on December 16, 2021. The app was initially released on April 21, 2021.