[Agent Device](https://agent-device.dev/) from Callstack is built for agent-driven mobile QA. Your agent explores the app through accessibility snapshots, stores refs to elements, runs multi-step flows, and captures evidence when something looks wrong. Lessons cover install, skills, session setup, and the patterns that work for React Native and Expo apps.
Agent Device
Agent Device gives coding agents real eyes and hands on iOS and Android—snapshots, taps, and replayable flows without burning context.
Your Learning Journey
The lessons in order
Agent Device Overview
What the first lessons cover.
Install & Skills Setup
Setup before the main build.
Snapshots & Interaction
The layout patterns that show up in every variant.
QA Flows in Subscribed
Patterns that go past the basics.
Real Examples
Put it to work in Subscribed.
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Complete your journey through Agent Device.
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