Privacy Policy

Last updated July 31, 2026

Milk Monster is a baby-tracking app for parents and caregivers. This policy explains what we collect, why, and the control you have. We built Milk Monster to be a quiet, private place for your family’s record — we do not sell your data and we do not show you ads.

Who uses the app

Milk Monster is intended for use by parents and adult caregivers. The information in the app is about a baby, but it is entered by the adults caring for that baby. The app is not directed to children and is not intended for use by children.

What we collect

Your account: your email address, password (never stored in readable form — our authentication provider keeps only a salted hash of it), and the display name you choose.
Your baby’s profile: name, birth date, sex, and an optional photo.
The log you create: feeds, sleep, diaper changes, pumping sessions, growth measurements (weight, length, head circumference), temperature readings, medicine doses, milestones, optional milestone photos, and any notes you add.
Family sharing: when you invite another caregiver, they join your household and can see and add to the same log. We record who logged each entry so the family can see “who did what.”
Notifications: if you enable push notifications, we store a device push token so we can deliver them. You can turn this off in your device settings.
Subscription status: if you subscribe to Premium, the purchase itself is handled by Apple or Google — we never see your payment details. We use RevenueCat, a subscription-management service, to know whether your account has an active subscription.
How you found us: we may ask one optional question at sign-up (“How did you find us?”), and on Android we receive the standard Google Play install-referrer string, which tells us which of our own links led to the install. We use this only to understand which of our efforts are working — first-party, never shared, and it never tracks you across other apps or websites.

We do not use third-party advertising or analytics SDKs, and we do not track you across other apps or websites.

We may occasionally use your account email to tell you about meaningful product updates — new features, important changes. These are rare, written by the founder, contain no tracking pixels, and every one includes a way to opt out. Account and security emails (like verification) are separate and always sent.

How your data is stored and shared

Your data is stored on our hosting provider, Supabase (which runs on Amazon Web Services), and is protected by access rules so that only members of your household can read it. We share your information only with the other caregivers you invite to your household. We do not sell, rent, or trade your personal information, and we do not share it with advertisers.

A small number of service providers process data on our behalf, each limited to what their job requires: Supabase (hosting, accounts, and your log), Resend and Amazon SES (sending account emails such as confirmations and password resets), RevenueCat (whether your account has an active subscription), Cloudflare (serving this website and routing mail sent to us), and Apple and Google (app distribution, purchases, and push notifications). None of them are advertising or analytics companies, and none receive your baby’s log except Supabase, which stores it.

Deleting your account and data

You can delete your account at any time from Settings → Delete account inside the app. If you are the only member of your household, deleting your account also permanently deletes your baby’s entire log. If other caregivers share the household, the shared log remains for them, and your past entries are simply no longer attributed to you. Deletion is permanent and cannot be undone.

Your choices

Edit or delete individual entries, milestones, and measurements at any time.
Export the history available to you as a spreadsheet from Settings, to keep or share with your pediatrician.
Leave a shared household, or remove your account entirely.

Changes to this policy

If we make material changes to this policy, we’ll update the date above and, where appropriate, let you know in the app.

Contact

Questions about your privacy? Email [email protected].