Privacy policy
Last updated: November 6, 2026. This covers the Android app Wake Window (package com.watermelonjuice.wakewindow), published on Google Play by Watermelon Juice.
The short version
If you do not use sharing, your baby's logs stay on your phone and we never get them. If you turn on sharing, they go to our server so your family's phones can sync. We show no ads, and we do not sell your data or use it to train AI.
What stays on your phone
Your baby's name or nickname, birth date, how early your baby was born (if you enter it), and all sleep, feed and diaper logs are stored in the app on your phone.
If Android backup is on, Android may copy this to your own Google account. That lets your logs come back on a new phone. You control this in your phone's settings.
What leaves your phone
| When | What | Who handles it |
|---|---|---|
| You start or join a family | Baby's name or nickname, birth date, weeks early, all logs, a random device ID and a random sign-in ID | Google Firebase (Firestore and Authentication), stored in the EU |
| You use the contact form on this site | Your message and any reply address you give | Google Firebase, stored in the EU |
| Purchases | A random app user ID, purchase history, basic device data | Google Play and RevenueCat |
This data is encrypted in transit and at rest. Only phones in your family can read your family's data. We can reach it only to run the service or to carry out a request from you.
The app asks for no email address, no password and no photos. It does not use your location or contacts. It has no ads and no analytics service.
Baby sleep and feeding data
Logs about a baby can count as health-related data. We use them only to show them to you and your family and to work out the nap estimate. The estimate runs on your phone. By starting or joining a family you agree to this data being stored as described here. You can stop at any time.
How long we keep data
Family data stays on our server until you delete it. Invite codes end after 3 days. Purchase records are kept as long as tax and store rules require.
Your choices and rights
You can delete your data in the app (see how). You can also ask us for a copy, ask us to fix something, or object. If you are in the EU or UK you can complain to your local data protection authority. Use the contact form.
Children
The app is for parents and caregivers aged 18 or over. It is not made for children to use. Parents enter the data about their own baby.
Changes
If this policy changes, we update the date above and the page.