Headroom

Support

Questions, bugs or ideas: SUPPORT_EMAIL. Please include your iPhone model and iOS version.

Common questions

What does the effect number mean?

It's an estimate, from 0 to 100, of how much of caffeine's usual effect you'll likely feel today. More recent caffeine days means more tolerance and a lower number.

What is “room before withdrawal”?

It's how many more milligrams today would likely keep you under the point where a day without caffeine tends to bring headaches or fog.

How accurate is it?

Approximate. The estimates start from population averages and adapt to your logs, your check-ins and, if you choose, your sleep data and DNA results. They're a guide, not a measurement, and not medical advice.

Is my DNA file uploaded?

No. It's read on your phone, three results are kept, and the file itself isn't stored or sent anywhere.

How do I export or delete my data?

In Settings, choose Export my data or Delete all data. Deleting also removes the caffeine samples Headroom wrote to Apple Health.

Does it need Apple Health?

No. Headroom works fully without it.