Comparison

FM Playground vs MindAttune

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

FM Playground

Features
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FM Playground is an educational app designed for learning and experimenting with FM synthesis (Frequency Modulation Synthesis). Developed as part of the "2025 Swift Sound - Creative Coding for Computer Musicians" project at MARTE Lab, Department of Multimedia, Dongguk University, by Yeonho Kim, Taejun Kim, Seoyul Son, and Sookyung Yoon, with guidance from Gwangyu Lee. The app features multiple interactive views where users can manipulate sound in real time using touch gestures and iPhone sensors (gyroscope, compass, etc.). Key Features: - What is FM Synthesis?: Learn the fundamentals of FM synthesis with an interactive view. Adjust sliders to hear real-time modulation effects and explore complex timbres. - Gesture-based control of timbre, frequency, and volume across various interactive views. - Open-source code available for study, experimentation, and expansion.

About

MindAttune

Features
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MindAttune is a generative artwork for iPhone and iPad โ€” a field of soft, luminous voices that drift endlessly in and out of alignment and never play the same moment twice. Nine sustained tones, each tuned to a calming frequency and given its own slow loop of a slightly different length, are set running together. Because no two loops share a common cycle, the voices slide forever against one another โ€” gathering into chords that bloom, dissolve, and never quite recur. Always different, always the same. Watch bands of warm-to-cool light swell and fade. Turn on the sound and the same system becomes audible: an ever-shifting ambient drone you can sink into. Then simply leave it running โ€” as a focus aid, a calm corner of your day, or something to drift off to. Every frame is generated live on your device. Nothing is pre-recorded and nothing loops; what you see and hear right now has never existed before and won't return. Features A living generative field โ€” never the same twice Ambient sound tuned to nine calming (Solfeggio) frequencies, driven by the same drifting clock as the visuals Hands-on controls: voices, drift rate, sound-to-silence balance, incommensurability, bloom, sway, and a custom color palette Seeded compositions โ€” find a configuration you love and return to any time Immersive full-screen mode Plays through the speaker, earphones, or external speakers Runs entirely offline Plant a few seeds, set the conditions, and watch what grows.

Screenshots

FM Playground4 screens
MindAttune2 screens

Verdict

The call

The clearest difference is price: FM Playground at Free against MindAttune's $1.99. MindAttune's advantage is iOS requirement (16.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

FM Playground is free to download; MindAttune costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences ยท 4 level
FM Playground versus MindAttune: the parameters behind the verdict, then further details
ParameterFM PlaygroundMindAttune
PriceFree โ€” better$1.99
Update frequencyEvery 3 daysโ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.016.0 โ€” better
Further details โ€” not scored
Size19 MB5 MB
Age rating4+4+
DeveloperGwangyu LeeGe Liu

In-app purchases

None

FM Playground

No in-app purchases

None

MindAttune

No in-app purchases

Questions

Is FM Playground free?
FM Playground is free to download, with no in-app purchases.
Is MindAttune free?
MindAttune costs $1.99, with no in-app purchases.
Do FM Playground or MindAttune have ads?
Neither FM Playground nor MindAttune shows ads.

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