Tiny Trials

Tiny Trials runs exactly one active experiment at a time from a small template set — caffeine cutoff, screen wind-down, morning light, steady wake — over a 7 to 90-day window with up to three tracked metrics. Completing an experiment is an archive-first transaction: the archive write happens before the active slot is released, so a failed write can never silently lose a finished experiment. Reports degrade to low confidence or 'no clear pattern yet' on sparse data rather than manufacturing a trend, and the app stores everything locally — no account, no cloud sync — with full JSON export and one-tap deletion under the user's control.