Resting heart rate, from your camera

Know how you really are, before the day decides.

Linden reads your resting heart rate with a 30-second face scan — no wearable, no chest strap, no account.

The scan is processed on your phone and deleted. Android coming soon.

Processed on-device We never see your face No account needed Free, forever

Three steps. About thirty seconds.

A morning check-in that asks nothing of you but a little light and a little stillness.

How it works

Step 1 · Scan

Hold still for thirty seconds

Prop your phone at face level in soft light. The front camera watches — nothing to strap on, nothing to charge.
Step 2 · Read

One trustworthy number

Linden reads subtle color changes in your skin and turns them into your resting heart rate. The video is processed on your phone and deleted.
Step 3 · Understand

One observation, never a verdict

It compares today against your own baseline — not a population average — and gives you one plain-language line about your day.

Your video never leaves your phone. The scan is processed on your device and deleted. We never see your face.

The privacy promise

On-device processing. The video is read on your phone, then deleted — never stored, never transmitted.
No account. No name, no email, no sign-in. Your history lives on your phone.
Anonymous analytics only. Tied to a random identifier, never to you — and never used for advertising.
You stay in control. Nothing leaves your device unless you choose to export and share it yourself.

One number, one observation, and the quiet space around them. No dashboards, no noise.

A closer look

Everything you need to know how you are is free, forever. Plus is there the day you want to go deeper.

Free, and a little more

Forever

For knowing how you really are, day to day.

30-day free trial

For patterns, depth, and a PDF your doctor can read.

The free tier — one scan a day with your full history — stays free.

One scan. One number. One honest read on your day — before it decides for you.

Android coming soon