OneBox: A Free AI Agent and Toolbox for Android – What It Means for Small Businesses

What Is OneBox?

OneBox is a free AI agent toolbox for Android, available on Google Play and the official site. According to the project’s GitHub repository, it is open-source under the Apache 2.0 license, meaning anyone can inspect, modify, or distribute the code. The app’s core idea is simple: you say what you need, and the built-in AI agent drives over 90 in-app tools to get it done. Examples include turning images into a PDF, logging a bill screenshot into a ledger, creating a to-do list, or looking up stock prices online.

The app also functions as a file viewer, supporting 124 unique file extensions across categories like images (24 formats), documents (11 formats), text and code (42 formats), audio (12 formats), video (13 formats), and archives (14 formats). This means small-business owners can open PDFs, Word documents, spreadsheets, and even code files without needing separate apps.

How the AI Agent Works for Small Businesses

The AI agent can invoke 90+ local tools—such as PDF processing, image editing, file management, and bookkeeping—and chain multi-step tasks across them. For a small business, this means you can automate workflows like converting a batch of receipts into a single PDF, then logging the total into a ledger, all in one conversation. The agent operates within the app’s own Android sandbox and declared permission set, so it never touches contacts, SMS, or call logs. Local tools run entirely on-device, and only the conversation with your chosen model goes online.

OneBox supports multiple mainstream LLMs from a single entry, with custom AI engines and prompt management. You bring your own API key—including free tiers like Gemini or OpenRouter’s free models—so the full assistant and agent are available at zero cost. Custom engines, endpoints, and tokens are fully open in the Google Play build and in builds from the repository.

Offline Capabilities: No Network, No Problem

OneBox includes on-device AI for chat, translation, and reading text from photos. For chat, you can 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 (available in Google Play and FOSS builds). Translation uses the Tencent Hy-MT2 1.8B model for 20 languages plus auto-detect, and camera input goes through on-device OCR, so photos are not uploaded. Reading text from photos uses a 26 MB PP-OCRv6 pack that is downloaded once and SHA-256 checked, supporting Chinese, English, Japanese, and common Latin scripts.

For small businesses, this means you can process sensitive documents—like customer invoices or internal notes—without sending data to the cloud. The app also has a picture-in-picture robot: when a long agent task runs, you can leave the app and the mini-window robot keeps you posted on progress, with one tap to return to the result.

What It Means for Your Business

OneBox replaces the need for multiple separate apps for scanning, bookkeeping, file conversion, and document viewing. Instead of juggling a PDF reader, a scanner, a note-taking app, and a spreadsheet viewer, you have one app that handles all of them. The AI agent reduces the learning curve: instead of memorizing steps or hunting for tools, you simply describe what you want.

The open-source nature means you can verify how data is processed locally and what never leaves the device. The app is free, with no subscription required if you use your own API key or offline models. This is especially useful for small businesses that want to keep costs low while automating repetitive tasks.

Takeaways

• OneBox bundles 90+ tools and an AI agent into one free Android app, reducing app clutter for small businesses.
• You can use your own API key or offline models, so there are no ongoing subscription costs.
• On-device AI for chat, translation, and OCR means sensitive data stays on your phone, not in the cloud.