Cub Tracks · last updated 29 August 2026
Cub Tracks records what you type about your baby so it can show it back to you. It does not sell your data, show you advertising, or track you across the internet.
You can reach me at contact@cubtracks.com about anything on this page.
Only what you enter, plus what is needed to sign you in. Everything is optional.
Data is stored in Google Firebase (Firestore and Authentication), on Google servers in the United States. Google processes it on my behalf under their data processing terms. Nobody else has access.
Security rules on the database mean your babies and entries can be read and written only by your own account. This is enforced on the server, not just in the app.
The app loads code libraries from public CDNs when it opens: jsdelivr, and Google's gstatic and apis.google.com. Those requests carry no data about you or your baby beyond the ordinary fact of the request.
If you sign in with Google or Apple, that sign-in happens with them directly and they will know you used it. Apple's "Hide My Email" gives the app a forwarding address instead of your real one, and the app treats it as your address; it never sees the one behind it.
As the app works with no signal, a copy of your data is kept on your own device. Signing out clears it, and so does deleting your account.
One part is kept deliberately: the database's own offline store, which holds entries you made while disconnected so they are not lost before they sync. Clearing it during sign-out could discard an entry that had not reached the server yet. It is emptied when those entries sync, and removing the app removes it entirely.
If you are in the UK or EU, these are your rights under the UK GDPR and GDPR: access, correction, erasure, portability, and objection. The lawful basis for storing this data is your consent, which you give by creating an account and can withdraw by deleting it.
The data is about a child, but the account belongs to an adult. Cub Tracks is not for use by children, and there is nothing in it directed at them. You are the one entering the information, and you decide what to enter.
Until you delete it. There is no expiry, because a record of your baby's first year is the kind of thing people want to keep. Delete your account and it goes.
Cub Tracks describes what your baby has done. It does not diagnose anything, and its estimates are not clinical guidance.
If this policy changes in a way that matters, the date at the top changes and you will see a notice in the app. I pledge that I will not quietly start collecting your data in any nefarious way.