figure out when to sleep, how much you're missing, and what's quietly wrecking your nights.
Enter a wake-up time or a bedtime and get sleep windows aligned to 90-minute cycles; tailored by age, with three timing options to choose from.
Log your sleep for the past seven nights and see exactly how far behind you are; calculated against the recommended hours for your age group.
Tell us how long you scroll before bed. We'll tell you what it's costing your sleep and generate a card worth sharing (or haunting you with).
Compare your weekday and weekend sleep times to measure your social jet lag and get a plan to close the gap.
See how screen light delays your melatonin curve based on when you stop scrolling, an interactive visual that makes the science click.