Build a Forced Workout App with Claude
EfficientLetter3654 · reddit · 2026-07-17
Using Claude (mentioning Fable 5 and Opus 4.8), the author built an iOS app called Rizen to solve their own problem of "knowing I should exercise but always procrastinating."
Product Approach
- Forces micro-workouts via timed alarms
- Alarms can only be dismissed after completing specific exercises (squats, push-ups, sit-ups, etc.)
- Uses the camera for rep counting to prevent cheating by manually tapping "done"
- Early versions allowed bypassing by force-quitting, which has since been patched
Results & Takeaways
- The author reports using it consistently for months, making it one of the few methods that actually stuck
- This approach of "turning a personal pain point into a product" demonstrates how AI-assisted development can rapidly transform shelved ideas into sellable apps
- Currently iOS only, with Android in beta; offers a 7-day trial and a 2-week promo code for the community
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