---
title: "FM Playground - Reviews, Revenue and Downloads in South Korea | Apple App Store"
description: "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 Compute"
---

# FM Playground — South Korea

![FM Playground App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/3a/8f/95/3a8f9531-46ce-0879-6715-a086c6fa8203/AppIcon-0-0-1x_U007epad-0-1-P3-85-220.png/434x0w.png)

**Developer:** [Gwangyu Lee](https://apptail.io/developer/gwangyu-lee-pAq)
**Category:** Music
**Rating:** 5.0/5 (2 ratings)
**Price:** Free
**Bundle ID:** gwangyulee.FM-Playground
**Store:** Apple App Store
**Country:** South Korea
**Version:** 1.1 (released 2025-10-06)
**Original Release:** 2025-10-03
**Languages:** Korean, English, Japanese

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/kr/app/app/id6753267191)
**AppTail Page:** [https://apptail.io/app/fm-playground-FSUw/south-korea](https://apptail.io/app/fm-playground-FSUw/south-korea)

## FM Playground Description
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.

## FM Playground Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/3f/e4/74/3fe474f7-456e-4ca4-13f4-c24aca3f86ab/slice1.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/71/0d/c4/710dc4ad-0fac-8784-6ab8-5c16c445b827/slice2.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/b7/4d/99/b74d999e-15d3-b32a-d744-9831dcd1e3fe/slice3.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/53/37/94/5337948f-b031-d4fa-f54e-d62268e64d05/slice4.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/7d/b0/64/7db064bb-ef11-4c1b-2d16-62bcda221e6a/slice5.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ca/19/5a/ca195a90-dac7-ca7c-7e26-35a6606baf3c/slice6.png/1284x2778.png)

## FM Playground Rating Breakdown in South Korea
- 5 stars: 2 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)






## FM Playground Available In
- [South Korea](https://apptail.io/app/fm-playground-FSUw/south-korea)
- [Japan](https://apptail.io/app/fm-playground-FSUw/japan)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*