Codename Jo

Codename Jo is a native iOS voice assistant that helps you handle email and related work by talking out loud. It’s aimed at people who want inbox triage, summaries, and actions (like drafts, calendar updates, and scheduling) without switching apps.

It focuses on the tasks around your messages and work tools, including:

• Inbox ranking and weekly readout sorted by what matters
• Summaries, drafting, and sending replies from what it reads in your mail
• Email actions like archive, labels, unsubscribe, and filters
• Calendar updates based on what you say
• Longer jobs via background work so the conversation keeps moving

Jo connects to services you choose, using your own credentials. Supported connectors include Gmail and Google Calendar, Slack, GitHub, Notion, Granola, and custom MCP servers. With GitHub, it can pull issues, PRs, checks, commits, notifications, and workflow runs, and it requires your confirmation for actions like merging or editing.

A major point of differentiation is where work happens. The app is described as fully client-executed, with tool calls and decisions running on your phone using your OpenAI key. It also claims it stores nothing about your mail on a server, and it lists no analytics, telemetry, push, call recording, or feedback uploads.