In simple English
Building an app means checking if buttons work and flows make sense. Doing this by hand takes hours every time you change something. This tool lets an AI agent use your app like a real customer. You write a simple goal, such as creating an account. The agent clicks, types, and reports where people get stuck.
What it is
Harness is a native macOS developer tool that connects an AI agent to an iOS Simulator, a macOS app, or a web app. It reads screenshots, performs clicks and keystrokes, and outputs a step-by-step report of any user experience friction it finds.
What it is good for
Solo developers and small teams who want automated user testing on Apple platforms and the web without writing complex test scripts.
- Tests iOS, macOS, and web applications from a single tool.
- Uses natural language goals instead of scripted test code.
- Integrates with local models or cloud AI providers.
- Requires macOS 14 or newer and Xcode to build from source.
- Needs screen recording and accessibility permissions to control apps.
- Relies on third-party AI service availability and token costs.
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git clone https://github.com/awizemann/harness.git cd harness git submodule update --init --recursive brew install xcodegen xcodegen generate open Harness.xcodeproj