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Brokenithm

TestFlight beta

Turn your iPhone or iPad into a CHUNITHM controller.

  • iPhone
  • iPad

Brokenithm is a native touch controller for SEGA’s CHUNITHM. Put your device in front of your screen, connect to the Brokenithm server on your PC, and play with a full 32-lane slider and air input. No arcade hardware required.

It’s based on the original Brokenithm concept by esterTion, rebuilt from the ground up in SwiftUI.

Setup

  1. Put your PC and your iPhone or iPad on the same Wi-Fi network.
  2. Start the Brokenithm server on your PC alongside the game.
  3. Open Brokenithm. The status bar turns green once the PC connects.
  4. Open the menu (the chevron in the top right) to turn on air input, pick an air height, tap your card or insert coins.

If the connection drops, choose Restart Connection from the menu. The app also reconnects on its own when you return to it.

Other ways to install

Every GitHub release includes an unsigned .ipa you can sideload with a tool like Sideloadly or AltStore. Free Apple IDs need to re-sign sideloaded apps every 7 days; TestFlight has no such limit.

Tips

  • Prop your device against the bottom of your monitor so the slider sits where the physical one would.
  • Turn off Auto-Lock while playing.
  • A 5 GHz Wi-Fi network or a phone-to-PC hotspot gives the lowest latency.

Questions about Brokenithm

What is Brokenithm?

Brokenithm turns an iPhone or iPad into a touch controller for SEGA's CHUNITHM, with a full 32-lane slider, air input and live LED feedback.

What do I need to use Brokenithm?

A PC running the game and the Brokenithm server, and an iPhone or iPad on iOS 18 or later on the same Wi-Fi network.

How do I install Brokenithm?

Join the TestFlight beta at testflight.apple.com/join/U6kwvETm, or sideload the unsigned IPA from the GitHub releases page.

Do I have to type in my PC's IP address?

No. The app advertises itself on your local network, so the PC finds it automatically.

How do I get the lowest latency?

Use a 5 GHz Wi-Fi network or a phone-to-PC hotspot, and turn off Auto-Lock while playing.

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