# OneBox (万宝盒) **English** | [简体中文](https://github.com/wangzhishou/OneBox/blob/HEAD/README.zh-CN.md) A free AI agent & toolbox for Android: say what you need and the built-in agent drives 90+ in-app tools to get it done — plus image & document tools, productivity and daily utilities, and 100+ file formats you can open right away. [](LICENSE) [](https://play.google.com/store/apps/details?id=com.shifenmiao.app) [](https://f-droid.org/packages/com.shifenmiao.app) [](https://ko-fi.com/wangzhishou)

Screenshots

Download

• International: Google Play · Official site
• 中国: 万宝盒官网 · 小米 / 应用宝 / OPPO / vivo / 华为应用商店搜索「万宝盒」

AI Assistant: More Than Just Feature Count

Plenty of toolbox apps are long on features. OneBox's built-in AI assistant saves you from hunting for tools and memorizing steps — just say what you want:

"Turn these images into a PDF." "Log this bill screenshot into my ledger." "Make me a to-do list." "Look up today's stock prices online."

It understands, acts, and reports back — in one flow.

• Bounded by its own permissions: everything the agent does stays inside the app's own Android sandbox and declared permission set — it never touches contacts, SMS or call logs; local tools run entirely on-device, and only the conversation with your chosen model goes online.
• An agent that drives the tools: the AI agent can invoke 90+ in-app local tools (PDF processing, image editing, file management, bookkeeping…), chaining multi-step tasks across tools — executed locally with per-tool timeouts and iteration limits.
• Picture-in-picture robot, no more waiting around: long agent task? Just leave the app — with an active AI session it drops into system picture-in-picture, where the mini-window robot keeps you posted on progress and one tap brings you back to the result. Native PiP, zero permissions required.
• One chat, many models: talk to multiple mainstream LLMs from a single entry, with custom AI engines and prompt management.
• Bring your own key — use it for free: drop in any OpenAI-compatible API key (including free tiers like Gemini or OpenRouter's free models) and the full assistant + agent is yours at zero cost. Custom engines, endpoints and tokens are fully open in the Google Play build and in builds from this repo.
• Models that run on the phone — fully offline: download a local model (Gemma 3 1B or Qwen3 0.6B) inside the app, or import your own .litertlm file, and chat without network, account or token cost — inference runs entirely on-device via LiteRT-LM (Google Play and FOSS builds only).
• Transparent by source: every line is public — how data is processed locally and what never leaves the device is something you can verify, not a promise you have to trust.

File Opening: 100+ Formats in One App

OneBox is also a file viewer. Tap an attachment in a chat app, a file in a file manager, or share one over from another app — it lands on the right screen, with no separate Office, PDF, media player or unzip app.

124 unique extensions. Every single-file entry point — file browser, external intents, deep links, AI agent tool calls — goes through the same ContentRouter in core/ui, so a file opens the same way wherever it comes from. A few pro formats (camera RAW, uncommon audio codecs) depend on the system decoder; when they can't be decoded, OneBox says so or hands them off.

Features

OneBox ships 107 feature modules. Local tools run entirely on-device; only the conversation with your chosen AI model goes online. The tables below list every module — names refer to the feature/* directories in this repo.

AI & Assistant

Image Viewing & Editing

Filters & Effects

Conversion & Compression

Metadata & Encoding