What's different

Same Sauna as the web app, with a few deliberate differences for a chat surface.

What carries over from the web app:

• Ask anything. Research, draft, summarize, analyze, look things up.
• Work with files. Sauna can read, write, edit, and patch files. It can produce a Markdown artifact and send it back as a PDF, or edit something in your Knowledge.
• Run code. Bash and scripts, same as the web app.
• Search. Web search, deep research, people and company lookup.
• Pull from Knowledge. Sauna can search your saved files, Memory, and Skills.
• Spawn helper agents. Sauna can fan work out to subagents the same way it does in the web app.
• Bring in new connections. If Sauna hits a wall on an app you haven't wired up, it texts you a link. Works for Pipedream-native apps and for any MCP server or API you want to plug in.
• Voice in and voice out. Sauna transcribes your voice notes and can reply with a native iMessage voice memo.

Web-app only, for now:

• Plan mode. The web app lets you flip between Do and Plan. iMessage is locked to Do.
• Model picker. The web app has Fast, Balanced, Smart. iMessage runs on Sauna's most capable mode.
• Clarifying questions. iMessage Sauna makes its best guess instead of pausing to ask. If the guess is off, text /new and retry with a clearer prompt.
• Browser automation. Sauna can read web pages on iMessage, but it can't click through a sign-up form or drive a UI on your behalf, jump back to the web app for that.
• Outbound reactions. Sauna reads your tapbacks but doesn't send its own.
• Scheduling tasks. Tell Sauna "remind me every Monday" on iMessage and nothing gets scheduled, scheduled tasks are created from the Scheduled page in the web app, regardless of surface.
• Relationships, Ideas, and Home flows. Web-only.
• Brain Access and Shared Folders. Multiplayer is web-only for now.