OneBox

OneBox is a free, open source Android app that combines a collection of more than 90 on device utility tools with a built in AI agent. A user describes what they need in plain language and the agent drives the tools to do it, instead of the user hunting through menus for the right one. The toolbox covers documents and PDF work such as a PDF toolkit, document scanner and image to text, image editing including compression, conversion, long image stitching, an ID photo maker and an editor, privacy tools such as photo metadata stripping, watermarking and QR and barcode handling, and daily productivity items such as collage and poster making, file transfer, bookkeeping, a teleprompter and habit check ins. An AI chat arena lets users compare models side by side. The vendor states that nothing leaves the phone unless the user chooses, and that the agent is bounded by its own permissions. AI features work with the user's own key. Built in presets and a custom engine form accept any OpenAI compatible endpoint, with named options including DeepSeek, Doubao, Kimi, Qwen, Hunyuan, ERNIE, MiMo, Gemini and OpenRouter. The app is released under the Apache 2.0 license, shows no ads, and is available from Google Play or as a direct APK download. It is free to use, and the user pays their model provider directly for any API usage.