Product support
Use the support address for account help, Apple Health permissions, subscriptions, workout recording, app behavior, feature requests, or general feedback. Please do not send private health records or account passwords.
Founder contact
For company, partnership, press, or founder-level product questions, contact Zach directly.
Editorial corrections
If a Journal article has an outdated source, an unclear distinction between research and Metric behavior, or a factual error, include the article URL and the passage that needs attention. Material corrections are reflected in the page review date.