pocket/grammer vs BYOT Coding Agent

Your phone is now a full coding environment. pocket/grammer runs AI coding agents with open models that live entirely on your device — no account, no cloud required — and shows you what it built in a live preview, right on your screen. AN AGENT THAT PLANS, THEN CODES - Ask for a feature in plain language. pocket/grammer asks clarifying questions, then writes a step-by-step plan you can review before a single line changes. Hand the plan to code mode and watch each step execute — with history for every file it touches. REAL MODELS, REALLY ON-DEVICE - Download open models sized to your device — Qwen 2.5 Coder, Qwen 2.5 Instruct, Qwen 3, and SmolLM2 — and run them entirely offline. Your code never leaves your phone unless you tell it to. A REAL WORKSPACE - Multi-tab code editor with syntax highlighting and autocomplete • Diagnostics that catch syntax errors and unbalanced brackets as you type • Regex-powered search across every file in the project • A file tree you can drag to rearrange, with rename, copy, and delete • File history: step back to any earlier version of any file LIVE PREVIEW - Run web projects instantly in the built-in preview. Switch between fit, mobile, and tablet viewports, and watch console output and errors in a dedicated panel — the preview reloads automatically as the agent writes code. GITHUB IN, CODE OUT - Browse a GitHub repository and import its files into any workspace, then let the agent build on them. BRING YOUR OWN KEY - Prefer frontier models? Add your own API keys for OpenAI, Anthropic, Google Gemini, OpenRouter, or a custom OpenAI-compatible endpoint (LiteLLM works great). Keys are stored securely on your device, and you choose which role — planning or coding — uses cloud versus local. YOUR DESKTOP, PAIRED TO YOUR PHONE - Open your workspace in any browser on the same network and keep using the IDE you love — VS Code, Cursor, or any of them — with your phone doing the AI work. One-time purchase, unlimited devices on your Apple ID. FREE TO START, YOURS FOREVER - Every mobile feature is free. Desktop Access begins with a 7-day free trial, then unlocks with a single $19.99 purchase — never a subscription. PRIVACY FIRST - No account required. On-device models work in airplane mode, and cloud providers are only called when you choose them.

BYOT is a native client for OpenCode, the open-source coding agent. Connect to the OpenCode server running on your own computer and drive coding sessions from your iPhone or iPad. Browse projects and sessions, send prompts with photos or files, and watch assistant text, reasoning, and tool activity stream live. Inspect tool inputs, progress, output, and errors. Answer permission requests and questions from your server, queue follow-up prompts, and choose models from your server's catalog. Review session diffs when your server supports them. Switch between saved servers, group sessions by project or browse them in one list, and find sessions by title, project, or path. Unsent text and attachments stay on this iPhone across session changes and app relaunches. Choose System, Light, or Dark appearance. With the optional BYOT companion running on your computer, get notifications for approvals, questions, completed turns, and errors. Enable the computer queue to keep accepted prompts running in order while BYOT is closed. Your computer must remain awake and the companion connected. Work that has not finished uploading needs BYOT to reconnect; uncertain delivery requires your review. BYOT supports OpenCode 1 and OpenCode 2 beta servers with automatic protocol detection. Available features depend on the server version; some OpenCode 2 beta servers do not expose per-session diffs. Your server does the work. BYOT renders its responses and sends your instructions over HTTPS. There is no BYOT account or sign-up, and no tracking. Anonymous usage data is off until you turn it on, and it never includes your prompts, code, server addresses, or project names. Server passwords are stored in the iOS Keychain. In direct mode, prompts and attachments go to your configured server and the model providers you enable there. Optional notifications and the computer queue use the BYOT relay for device registration, delivery, and encrypted queued content. See the privacy policy for storage and retention details. Requires an OpenCode server you operate, reachable over HTTPS, for example through Tailscale. Notifications and the computer queue also require the BYOT companion. BYOT is an independent client and is not affiliated with the OpenCode project.