CommitFitStart free →
StickK alternative

A modern StickK, built for workouts.

StickK invented the consumer commitment contract. CommitFit takes the same proven psychology and wraps it in a fitness app with an AI trainer, scheduled sessions, and automatic charges when you skip — so you never have to self-report.

Feature
StickK
CommitFit
Built for fitness specifically
No — general goals
Yes
AI-generated workout plan
No
Yes
Auto-detects missed workouts
No — self-report
Yes
Free skip allowance
No
1 per week
Custom stake amount
Yes
Yes ($1–$1000)
Subscription fee
None
None
Calorie & macro tracking
No
Yes

Why fitness-specific matters

StickK is brilliant for big, infrequent goals: writing a book, quitting smoking, finishing a course. But the commitment-contract mechanic was never designed for the daily grind of training. You'd have to log every workout manually, mark wins and losses by hand, and hope your referee remembers to check.

CommitFit collapses all of that into one loop. The app generates your weekly plan, schedules it on your calendar, and watches whether you check in. Miss a session without rescheduling? You're charged automatically — no referee, no self-reporting, no excuses.

Built-in safety nets

  • One free skip per week — life happens. A flat tire shouldn't cost you $25.
  • Reschedule before cutoff — move a workout to another day without paying.
  • Choose your own stake — $5 if you're testing the waters, $100 if you need the pressure.

Try a StickK that works for workouts

$0/month. You only pay when you skip a workout you said you'd do.

Make my commitment →