One-off / 01

TUFF

A habit challenge app built around rules that get annoying fast if you fake time, streaks or offline state.

Notes

I used it to learn what an agent-heavy build feels like when I still own the product decisions and review.

The useful bit was building time simulation so I could test missed days and failed challenges without waiting a month.

TUFF daily habit dashboard showing challenge progress
01Daily check-in
TUFF statistics view with completion data
02Progress, without the guilt trip
TUFF challenge calendar with completed days
03A calendar that understands the rules
TUFF profile and overall progress view
04The longer view