The short version: this app collects nothing about you. The detail is below.
Everything you enter stays on your device. There is no account, no server, and no login. We cannot see your data because it is never sent to us.
The app makes no network requests to us. Deleting the app deletes everything it stored.
This app is not directed at children under 13 and does not knowingly collect information from them.
If what this app collects ever changes, this page changes with it — it is generated from the same declaration that produces the app's App Store privacy labels, so the two cannot disagree.
Questions about this policy: Support.