Sleep Habit Track

Find what's wrecking your sleep. SleepHabit turns a thirty-second nightly log into honest, on-device answers. Record when you went to bed, when you woke up, how often you woke in the night, and how you feel — then tag the day before: caffeine, alcohol, exercise, stress, screens, a nap. Tag when it happened, too, because coffee at 3pm and coffee at 11pm are not the same night. WHAT YOU GET • "On nights with caffeine within 2h of bed you fell asleep 38 min later on average" • Timing contrast: before-bed caffeine vs afternoon caffeine • Frequency facts: "You logged alcohol on 12 of 30 nights, and woke at least once on 9" • Sleeping, waking, wakings and energy compared across your own nights HONEST MATH, BY DESIGN • A finding needs at least five nights on each side and fourteen nights overall • It also has to clear a noise floor: 15 minutes of sleep timing, 0.5 wakings, 0.3 energy points • Everything is described as a correlation, never a cause. SleepHabit is not a medical device and does not diagnose anything. PRIVATE BY CONSTRUCTION • No account, no sign-up, no server, no analytics, no ads • Every calculation runs on your iPhone from your own log • Export a JSON backup whenever you want; it is the only copy that ever leaves the app FREE FOREVER Logging and your full history are free, forever. The last two weeks of insights are free too. A single one-time purchase unlocks the long view: 30, 90 and 365-day windows plus all-time, computed over every night you have logged. No subscription, no trial that bills you, no ads. Your sleep, your data, one price.