what is restup?
RestUp reads last night from the watch you already wear and tells you, in one number and a line of plain words, whether today is a day to push or a day to rest.
RestUp in one paragraph
RestUp is a sleep and recovery app for iPhone and Android that turns last night into one number. Each morning it reads the sleep, heart rate, resting heart rate and heart rate variability your watch recorded — from Apple Health on iPhone, or Health Connect on Android — and scores how recovered you are out of 100. The score is a weighted blend of five components, each judged against your own recent history rather than a population average: sleep balance, recovery, training load, nervous-system balance and consistency. Above 85 means ready for a big day; below 55 means your body is asking for rest. Alongside it you get your sleep explained in plain words, a seven-night sleep debt ledger, and your chronotype read from real nights rather than a quiz. Every calculation happens on your phone. There is no account.
How does it work?
Each night the watch or tracker you sleep in records your sleep stages, your heart rate, your resting heart rate and your heart rate variability (HRV). In the morning RestUp reads those from Apple Health on iPhone, or from Health Connect on Android, and compares them with your own last two weeks, not with anyone else’s. That comparison becomes your readiness score: a number from 0 to 100 that sums up how recovered your body is today. The full method lists every component and threshold.
What are sleep debt and chronotype?
Sleep debt is the gap between the sleep you got over the last seven nights and the target you set, eight hours unless you change it, so a short night shows up as a number you can pay back. Your chronotype is the time of day your body naturally prefers to sleep and wake, read from a week or two of real nights rather than a quiz.
Is RestUp a medical device?
No. RestUp is a wellness companion, not a medical device: a low score is a nudge to rest, not a diagnosis.