UMIDE

The cross-platform mobile AI IDE — with the emulators built in

🧪 v0.4.0-beta.1 is open for beta testing.
Try the embedded iOS Simulator (no Simulator.app) and the new top-bar Run buttons — report a bug · discuss.

UMIDE is a cross-platform mobile AI IDE for React Native & Flutter, built in Rust. It embeds the Android emulator and iOS Simulator right in the editor — on macOS the iOS Simulator runs headless, with no Simulator.app window — and ships a built-in AI assistant that can see and drive those devices. One window: code, run, and debug on real devices without switching to Xcode or Android Studio.

Download (beta)

Get the beta from the Releases page (it's marked Pre-release):

• macOS (Apple Silicon & Intel) — signed & notarized .dmg. Full product: editor, embedded Android emulator + embedded iOS Simulator (no Simulator.app), and the AI assistant. Embedded iOS needs brew install idb-companion (without it, UMIDE falls back to the Simulator.app view).
• Windows — .msi installer. Editor + AI assistant + embedded, interactive Android emulator (preview) — live screen with tap/drag, hardware buttons (Home/Back/Recents/Power, volume, rotate), keyboard input, and a screenshot button. iOS Simulator stays macOS-only. The installer isn't Authenticode-signed yet, so SmartScreen may warn on first run — choose More info → Run anyway.
• Linux — .deb or tarball. Same portable Android panel as Windows, but preview only (not yet run live end-to-end). iOS Simulator stays macOS-only.

New to the beta? See the Beta testing guide for setup, what to try, and known limitations.

Screenshots

Features

• Unified Mobile Environment: the Android emulator and iOS Simulator embedded directly in the IDE. On macOS the iOS Simulator runs headless — no Simulator.app window — booting into the panel with tap/swipe/keyboard input (requires idb_companion).
• Device Logs in the IDE: the running device's native logs — Android logcat and the iOS simulator's unified log — streamed live in a bottom panel with severity colouring, follow/tail, and Clear. No Android Studio or Xcode needed to read logs.
• Run on Device, up top: a prominent ▶ Run button in the top bar. On macOS you pick the target — ▶ Android or ▶ iOS — and it builds & runs your React Native / Flutter / Expo app in a live terminal; other OSes show a single ▶ Run.
• RN/Flutter auto-detection: UMIDE detects React Native and Flutter workspaces (status-bar badge) and feeds that context to the AI assistant, so the agent knows your stack without being told.
• AI Coding Assistant — bring your own key: A built-in, approval-gated agent powered by the provider you already use (connect your Claude or OpenAI API key). It reads your code, proposes edits and runs commands with per-action approval, and can see and drive the embedded device to verify its own changes.Opt-in — the built-in BYO-key providers stay the default.
• Chat sessions: New Chat, a session switcher, and per-workspace history so conversations persist across restarts.
• Cross-Platform Support: First-class support for React Native and Flutter.
• High Performance: Built on Floem and Rust for lightning-fast speeds.
• Based on Lapce: Forked from Lapce, inheriting its Rust-powered speed and editor features.

License

Copyright 2026 UMIDE contributors Portions (original editor) Copyright 2023 Lapce contributors

UMIDE is a fork of Lapce. See the NOTICE file for attribution.

Released under the Apache License Version 2.