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sim-use: let AI touch the screen of your iOS or Android device
A cross-platform CLI tool developed by a subsidiary of LINE Yahoo that allows AI agents to monitor and control iOS Simulator and Android emulators/devices (~300ms/interaction).
observe transforms UI contents into a compact representation that’s more efficient in terms of tokens (16x less than accessibility json) and act performs actions such as tapping, swiping, and typing on elements by their aliases rather than pixels. It takes ~300ms to complete a round trip. It comes with a Claude skill and works with iOS Simulator and Android emulator/device. It was published at v0.9.0 in June 2026.
Why a vibe-coder should care
For AI agents that need to test/automate mobile apps, this is a better alternative to taking screenshots and parsing coordinates.
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