Physics Playground
Last updated: March 31, 2026Physics Playground is an interactive science education app. We take your privacy seriously and collect the minimum data needed to make the app work well.
The app signs you in anonymously using Firebase Authentication. This creates a random user ID so your experiment progress can be saved. No email, name, or social login is required or requested.
Your anonymous account is tied to your device. If you uninstall the app, your progress is no longer accessible (we do not link it to any external identity).
The following is saved to Firebase Firestore under your anonymous user ID:
This data is used only to display your progress inside the app. It is never shared or sold.
We use Firebase Analytics (by Google) to understand how the app is used — for example, which experiments are most popular and how long sessions last.
Firebase Analytics is governed by Google's Privacy Policy: policies.google.com/privacy
The app offers an optional camera feature that uses your device's front camera to detect hand gestures for hands-free control of experiments.
Physics Playground does not track you across other companies' apps or websites. We do not use advertising cookies or third-party tracking SDKs beyond Firebase.
Physics Playground is designed for users of all ages, including children. We do not knowingly collect personal information from children. Because we use anonymous authentication only, no personal data (name, email, date of birth) is ever entered or stored.
All data is stored in Google Firebase, which uses industry-standard encryption in transit (TLS) and at rest. Access is restricted by Firebase Security Rules so only your anonymous user ID can read or write your own progress data.
To delete your data, contact us at the email below and we will remove your anonymous Firestore record within 30 days. Uninstalling the app also severs access to the data (your anonymous credentials are lost with the uninstall).
If you have questions about this policy or want to request data deletion, contact us at:
We may update this policy as the app evolves. The "Last updated" date at the top will always reflect the most recent version. Continued use of the app after changes constitutes acceptance of the updated policy.