All sleep tracker features at a glance

Record your night and sleep score

You start recording before you sleep and stop in the morning. From that, SleepKit calculates a score: 40% sleep duration, 30% restfulness, 20% quiet in the room (snoring share) and 10% regularity compared with your last seven nights.

• Record unlimited nights, free
• Correct times afterwards
• Morning journal with mood, energy and a note

• iPhone
• Apple Watch

Sleep stages – measured or estimated

With an Apple Watch, SleepKit takes the measured stages from Apple Health. Without a watch, the app estimates awake, light, deep and REM sleep from the sounds and movement picked up by the iPhone on your nightstand. Every night is labeled: measured, estimated or corrected.

• iPhone
• Apple Watch

Snore recorder: record and listen

During the night, your iPhone recognizes snore-like sounds and records short clips. The five loudest of each night are free to play, all recordings with Premium. The recordings stay on your iPhone.

For a night you start on the Apple Watch, the iPhone does not use its microphone – so there is no snore recording.

• iPhone

Smart alarm and bedtime

Set your wake-up time and, optionally, a window of 15, 30 or 45 minutes: SleepKit wakes you within it when you’re in light sleep – and no later than your set time. You choose the alarm tone, fade-in and snooze. The alarm uses the alarm feature of iOS 26.

• Bedtime reminder
• Sleep goal from 6 to 9 hours
• Power nap with 20, 45 or 90 minutes

• iPhone

Heart rate, HRV and vitals

If your Apple Watch measured during the night, SleepKit shows heart rate (average, minimum, resting), heart rate variability (HRV), blood oxygen, respiratory rate and wrist temperature. Missing values are hidden instead of estimated.

• iPhone
• Apple Watch

Sleep sounds, mixer and timer

73 sounds in 11 categories, all included in the app and usable offline. 25 are free, the other 48 come with Premium. In the mixer you layer 3 sounds, up to 8 with Premium; the timer fades out gently after 15 to 90 minutes.

• 2 saved mixes free, unlimited with Premium

• iPhone

Apple Watch

Start and stop the night on your wrist and check score, week, vitals and alarm time. A complication shows your sleep score on the watch face.

• Apple Watch

Widgets, Live Activity and Siri

Widgets show last night and your bedtime, including on the Lock Screen. A Live Activity runs while you record, and with Siri you start and stop the night by voice.

• iPhone