Make sure your Apple Watch captures your sleep accurately

Learn the science behind Welldo’s stress calculation

If you see Error 1001, 1002, or 1003 after tapping Sync in the Welldo Apple Watch app

Possible reasons no sleep data is shown

If you're having trouble adding Welldo watch faces or complications, don't worry

Learn to check your HRV anytime

Why your HRV may be delayed and how to fix it

It's important to understand how Apple Watch complications work.

Discover why monitoring your RHR matters

Common causes of missing live stress data

Before installing the Welldo Apple Watch app, make sure your Apple Watch is running watchOS 9 or later.

Your Apple Watch can show your health data directly on the watch face using Welldo complications.

Discover how your daily stress score is measured

Start workouts easily and track your activity

Reasons stress alerts may not reach you

Control which app Apple Health uses for sleep data

Learn the basics of Resting Heart Rate

Research-backed habits to boost your nightly sleep

Find out why your Body Battery isn’t recharging and how to fix it

Under normal conditions, your Apple Watch and iPhone use the same personalized stress standards to calculate and display your stress level.

Allow full Health access for better accuracy

Learn what HRV is, how it’s measured, and why it matters

Learn how HRV measurements are tracked throughout the day

See what real-time stress reveals about your body

A simple breakdown of each sleep stage and its role

Learn how we interpret your live stress readings

Understand when low stress is beneficial—or not

Be aware of your energy reserves & readiness.

Understand why data isn’t available yet.