Your normal
is the
reference.

Understand your recovery, sleep and heart health through the history that makes you, you.

For iPhone · iOS 17+ · Available on the App Store

Baseline Sleep view showing illustrative sleep stages and personal sleep history
Your nights, in perspective.Actual app · illustrative data

Built around you.

Your history stays on your iPhone.No account required to start.

The numbers are yours.
The meaning should be, too.

Sleep, heart rate, recovery. Your wearable records the moments. Baseline brings them together, learns your usual range, and helps you notice what meaningfully changes.

A little context.
A clearer day.

See the story behind your numbers, from last night’s sleep to the patterns taking shape over time.

Give last night some context.

See your sleep duration and stages alongside recent nights. Find the patterns that a single night's total can miss.

Find your connection

Make room for
the day ahead.

A steady morning. A lighter session. A closer look at a changing pattern. More context for the choices that are yours to make.

A lone runner following a quiet coastal path in the cool morning light
Understand the pattern. Choose your pace.

Keep the wearable.
Bring the history.

Start where your data already lives. Baseline turns compatible sources into one personal picture.

Apple Health

The simplest place to start

Bring in the sleep, heart rate and activity you choose to share from Apple Watch and compatible apps.

On your iPhone

Polar devices

Connect supported Polar 360, H10/H9, OH1 and Verity Sense devices directly for the data they provide.

Direct connection

Compatible smart rings

Sync supported QRing-compatible rings into the same history, with clear source selection across devices.

Direct connection

Available metrics depend on your device, its app and the permissions you grant. Not every wearable or ring is supported.

Your history.
In your hands.

Read our privacy policy

At home on your iPhone.

Health history is saved on your iPhone first. Core views work without an account or connection.

Cloud, when you choose.

Paid Baseline Cloud is an optional extension. Cloud copy and Cloud AI are separate, optional choices. You decide what to enable, and you can subscribe in the app or manage it from the web.

Honest about the unknowns.

Calibration, missing data and freshness stay visible. An incomplete picture should look like one.

Thinking about
a Mac companion.

A desktop view of the same personal history — nothing built yet. If you'd use one, tell us and we'll let you know first.

Get to know
your normal.

Start with the history you already have.
Let the picture build from there.

Download on the App Store

Available now on the App Store.