About Nightjar
Nightjar listens from your nightstand and works out when you were awake, in light sleep or in deep sleep. The audio is analysed on the phone and discarded in the morning.
Set a wake window and the alarm picks a moment of light sleep inside it. A weekly view shows how bedtime, caffeine and screen time line up with the nights you slept well.
What it does well
On-device analysis
Nothing is uploaded. Recordings are deleted after each night unless you save a clip.
Wake window
Pick a 30 minute window and wake during light sleep.
Weekly trends
See average sleep, bedtime drift and how tagged habits affect your nights.
Wind-down
Dims the screen and silences alerts at a time you set.
What’s new
1.9.426 Sep 2026
Lower battery use overnight, now about 9% on a typical phone.
1.9.05 Sep 2026
Habit tags in the weekly view.
1.8.215 Aug 2026
Fixed alarms that fired late after a system update.