Short nights and attack days often turn up together, and nobody wants to write down how they slept. AnxietyMe takes the night from your wearable, your health app or, on Android, the phone alone, and compares it with your attack days. Missed sleep and a nightmare are one tap each for the nights no device saw.

After one night without sleep, 40% of a group of people with panic disorder had a panic attack the next day.
Roy-Byrne et al., Arch Gen Psychiatry 1986Garmin, Oura, Polar and WHOOP connect directly; Apple Watch and most other devices come in through Apple Health on iPhone or Health Connect on Android. On Android the phone can estimate the night on its own: with usage access it reads the longest screen-off gap between 8 in the evening and noon as your sleep, ignoring gaps under two hours. iPhones do not share that, so on iOS sleep needs Apple Health or a wearable.
Each sleep signal is tested against your attacks with the same statistics as everything else. What Strengthens You shows the other side: the sleep habits that turn up on your days with no attack.
Late-night screen time on Android is collected next to the night it shortens, so a scrolling evening and a short night can be told apart in What Happened.
Monitor and then Sleep: last night at the top with duration, when you fell asleep and when you woke, then efficiency, disturbances, score and the deep, REM and light stages, with the history underneath and your attacks laid over it. Data lets you pick the source for each sleep metric.
A wearable, Apple Health or Health Connect for stages and a score. On Android the phone can give sleep timing alone with usage access. History graphs are part of Premium; the night itself is collected on the free app.
On Android, the timing, yes: with usage access it reads the longest screen-off gap between evening and noon as your sleep. Stages and a score need a wearable or a health app. On iPhone, sleep comes from Apple Health or a wearable.
Garmin, Oura, Polar, WHOOP, Apple Health on iPhone, Health Connect on Android, and the phone itself on Android.
Both. The night is stored as data, and the sleep triggers fire from it when a value crosses its line, so sleep is tested like any other factor.