Aether

Aether is an open source AI agent app for the phone and desktop, originally built for Android and now also available for iOS and macOS. It pairs a polished conversation interface, inspired by apps such as ChatGPT and Codex, with a local agent engine built on the Pi harness kernel, so the agent can run shell commands, call tools and act on the device rather than only chat. It is aimed at developers and technical users who want a capable agent on mobile with their choice of model provider. A built in Alpine Linux environment runs shell commands and tools out of the box, and on Android its files can be browsed from the system file manager. Agent Skills support repeatable workflows, and MCP servers over HTTP or stdio connect live documentation, search, APIs, GitHub and local files. Extensions can add Pi compatible agent tools and commands and also reshape Aether's own interface, pages and app behavior without forking the app. An optional Agent Mode launches a virtual display to open apps, tap, type and swipe when command line tools are not enough, and optional Shizuku and Termux integration gives deeper device control on Android. The interface is written in Kotlin and Jetpack Compose, with streaming responses, attachments and guided model setup. Aether is free. The source is published on GitHub under the GNU General Public License version 3, the Android APK is distributed through GitHub releases, and the iOS build is listed on the App Store. Users supply their own model provider accounts, and the developer accepts voluntary donations.