Source on GitHub

Build, sign and install iPhone apps on your iPhone.

Download Nyxforge 1.3 IPA, 112 MB

Free and open source. Needs iOS 18 or later and your own Apple developer certificate.

Nyxforge

What it does

Write and build
A code editor and compiler that run on the phone, so you can build Swift and Objective-C projects without a Mac.
Project to IPA
Build a project and send the IPA straight to the Signing tab. You can import a source zip as a project too.
Sign and install
Keep a library of IPAs and sign them with your own certificates. Change an app's name, icon or bundle ID, add tweaks, then install it to your Home Screen.
Update in the app
Get the newest release from Settings. Your projects stay where they are.
Run at 120 Hz
Smooth scrolling on ProMotion iPhones, with a Performance page to tune animations and the star background.

Install it

  1. Download Nyxforge.ipaIt's the newest build from GitHub Releases.
  2. Sign itUse a tool such as Feather with your Apple developer certificate and provisioning profile. Keep the provisioning file in the app.
  3. Install and set upInstall it, open it, and follow the setup screen.

Nyxforge installs alongside Nyxian. Later updates are in Settings > Management > Update Nyxforge.

This is an early build

So far it has only been used on one iPhone running iOS 27.0.1. Expect rough edges, and report problems on GitHub.