Track only what matters
You don't need to record your whole day. Start with a few habits you're curious about and add more if they become useful.
Put your sleep data in context
Sleep Tracker: Circadian
Sleep data can tell you how the night went, but it can't tell you what the day looked like. Circadian brings your habits and Apple Health sleep stages together so you can look for patterns over time.
Health & Fitness
01View habits alongside Apple Health sleep stages
02Choose from research-based habit ideas
03Look for patterns across several nights
04Sync your history privately with iCloud
Why it helps
Your sleep history makes more sense with context.
A late coffee, an evening workout, or a regular bedtime might be worth paying attention to. Circadian gives you one place to note those details and compare them with the sleep data you already collect.
Look beyond one night
Good and bad nights happen for all sorts of reasons. A longer history can help you notice repeated associations without treating them as proof.
Use it as a personal record
Circadian is a wellness tool, not a diagnosis. It's there to help you remember, compare, and have better-informed conversations about your routine.
How it works
Add a little context to each night.
Connect Apple Health
Allow Circadian to read the sleep stages recorded by your compatible apps and devices.
Note your habits
Check off the things you want to follow, such as caffeine, exercise, or a wind-down routine.
Review the history
Compare several days and nights, then decide whether one small change is worth trying.
Blog
Notes from the blog.
sleep diary with Apple Health
How to Keep a Sleep Diary With Apple Health Data
Add daily habit notes to Apple Health sleep stages and build a sleep diary that is useful without becoming a chore.
Read post Apple Health sleep stages meaningApple Health Sleep Stages: What the Data Can Tell You
Understand Awake, REM, Core, and Deep sleep in Apple Health, plus the limits of consumer sleep-stage estimates.
Read post sleep tracker data changes every nightWhy Sleep Tracker Data Changes From Night to Night
Learn why sleep duration and stages vary, how to review inconsistent data, and when a missing night may be a recording issue.
Read post habits to track for better sleep8 Habits Worth Tracking Alongside Your Sleep
Choose a manageable set of daytime and evening habits to record with sleep data, without turning the diary into a second job.
Read postFAQ
A few common questions.
Does Circadian work with Apple Health?
Yes. With your permission, it can read available sleep-stage data from Apple Health and show it alongside your habits.
Which habits can I track?
Circadian includes a set of sleep-related habit ideas. You can choose the ones that are relevant to your routine.
Can Circadian diagnose a sleep problem?
No. Circadian is a general wellness tool for recording habits and noticing associations. It is not a medical device or a substitute for professional care.
How is my history stored?
Your Circadian data can sync through your private iCloud account so it stays available across your devices.
Available on the App Store
Notice what tends to help you sleep.
Get Sleep Tracker: CircadianOur collection
