Nightly sleep log with quality score. Sleep-cycle-aware alarm calculator (wake at end of a 90-min cycle, not mid-REM). Daytime nap timer (20-min power nap vs 90-min full cycle). Caffeine + exercise + screen-time correlation. Sleep debt tracker. Not another fitness-band app — just the math, yours, private. For people who want better sleep without giving biometrics to a startup.
Went-to-bed time, woke-up time, quality 1-10, wake-ups count, notes ("woke up wired at 3 AM"). 30-second entry on phone. 12-month history graph.
Sleep happens in 90-min cycles. Alarm at the end of a cycle = awake, rested. Alarm mid-cycle = groggy. Enter your bedtime, get 4 wake-time options (4.5h, 6h, 7.5h, 9h). No more 7:00 AM guess.
20-min power nap (NSDR, no REM). 90-min full cycle nap (REM included, wake at cycle end). Not 40 or 60 — the grogginess trap. Built-in timer with wake-up audio.
Caffeine cutoff time × sleep quality. Last-meal time × sleep quality. Screen time after 9 PM × wake-ups. Your data, your patterns. Not a SaaS selling 'sleep insights' subscriptions.
Running 7-day average vs your target (8h). When you're 6h under target, the number is red. Visual motivation without pushing 'sleep score ads.'
Flask + SQLite. Your sleep data, caffeine log, wake times stay on your phone/laptop. Not fed to a health-SaaS that sells 'sleep tier' upgrades.
Hosted plans are early-access. Self-host today; email tim@dangercorn.net to join the waitlist.
naptime is one of 220+ verticals scaffolded from the same template. Each gets a working skeleton for free; individual ones get promoted to full products as demand surfaces.