DielBack to Diel

How can we help?

Questions, feedback, or something that does not look right? Send us a note and we will get back to you.

A note on privacy: please do not include health readings or other sensitive information. Diel keeps your health data on your device, and we cannot see it.

Please enter your name.

Please enter a valid email address so we can reply.

Please tell us a little about your question.

Common questions

Why is my index unavailable?

Diel needs enough recent history to establish your personal baseline. Keep your Apple Watch on for regular sleep and heart signals, and check that Diel has the Health permissions it needs.

How do I change Health permissions?

Open the Health app, tap your profile picture, choose Apps and Services, then Diel. From there you can review or change the categories Diel can read.

How long does calibration take?

Diel generally needs 7–14 days of data before it can show a personal index. The more consistent your data, the more useful your baseline becomes.

How do I delete my Diel data?

Use the data management controls inside Diel’s settings. You can also delete the app to remove its locally stored data. Read our Privacy Policy for more detail.