Isoline Support

Isoline tells you when you reach high altitude, checks for altitude sickness in a minute on iPhone or Apple Watch, and tells you what to do next.

Questions or problems? Email support@airdraw.net. We usually reply within two working days.

Why does Isoline ask for “Always” location?

So it can notice when you reach high altitude and remind you to rest and check in, even when the app is closed. Location never leaves your devices.

I don’t see a blood oxygen reading

A check-in needs a blood oxygen reading from Apple Watch taken in the last 30 minutes. Open Blood Oxygen on your watch, rest your arm on a table with your wrist flat, and hold still for 15 seconds. Isoline picks up the reading through the Health app. Apple Watch SE can’t measure blood oxygen.

Isoline isn’t on my watch

Open the Watch app on your iPhone, find Isoline and turn on “Show App on Apple Watch”. It needs watchOS 11 or later.

Is Isoline a medical device?

No. Results and readings are for reference only. If you feel unwell, trust how you feel: rest, use oxygen if you can, and go down and get medical help when it is serious.

How do I delete my data?

In Isoline, go to Settings → Delete All Data, or delete the app. Everything is stored on your devices. See the privacy policy.