Your AI plans it.
Parameter runs it.
No AI inside. You bring the one you already talk to. Parameter is the body: it runs every set, segment, and rest day on your iPhone and Apple Watch.
The beta is open on TestFlight. Join the beta
Requires iPhone (iOS 17+) · Apple Watch recommended
Works with Claude, ChatGPT, and any MCP client
Connect once. Then just talk.
Connect your AI
Add Parameter to Claude, ChatGPT, or any MCP client using your iCloud login. Revoke it anytime, in one tap.
Ask for a plan
Describe your goal the way you'd tell a coach. Your AI writes the plan straight into Parameter: every set, segment, and rest day.
Train on phone and watch
Segments auto-advance, rest timers run, every set is logged. Your AI reads the results and plans the next week.
Stop stacking two apps.
Strength, intervals, a class, an easy run, all in one place. No more switching between multiple apps to log your work.
Leave your phone in the locker.
Full execution on the watch: live heart rate, a distinct haptic for every event, and logging without touching your phone.
Auto-advancing intervals
Segments change with a haptic countdown. Heart rate zone alerts buzz when you drift.
Context on every set
Previous performance sits under each set. Adjust, check off, move on.
Rest timers on the wrist
The phone stays in the bag. Mirroring keeps both in sync anyway.
The boring parts, done right.
And that's only for the AI connection. The app is free: logging, execution, watch, history, export. No advertising, no data collection.
Your data lives in your own iCloud database. The AI Connector stores no workout data. We couldn't read your logs even if we wanted to.
No sign-up, no email, no password. Revoke any connected AI in one tap. Delete everything in one tap. Export is free, forever.
Do I need an Apple Watch?
No. Everything runs on the phone; the watch is recommended, not required.
Which AIs work?
Claude, ChatGPT, Gemini, Grok, Perplexity, and any MCP-compatible client.
What happens to my data?
It stays in your iCloud. Export it all as JSON/CSV anytime, free. Delete means delete.
Your AI already knows how to coach.
Give it something to run on.
The beta is open on TestFlight. Join the beta
Requires iPhone (iOS 17+). Apple Watch (watchOS 10+) recommended.