Privacy Policy

Who we are

Einstein Clock is developed and published by Luis Uribe, an independent inventor based in Riverbank, California. The app demonstrates Einstein's General Theory of Relativity through two real-time analog clock faces showing gravitational time dilation.

Information we collect

We collect absolutely no personal information. Specifically, Einstein Clock does not collect:

• Your name, email address, or any contact information
• Your location or GPS coordinates (GPS is used only locally on your device to estimate altitude, and is never transmitted anywhere)
• Device identifiers, advertising IDs, or hardware information
• Usage data, analytics, or crash reports
• Any of your data on our servers — values you enter (age, height, altitude) are saved only locally on your device, never sent to us or anyone else

How the app uses your device

Einstein Clock may request the following device capabilities:

• Location / GPS — Used only to read your current altitude above sea level, which affects the time dilation calculation. Your coordinates are processed entirely on your device and are never sent to any server or third party.
• Screen wake lock — Used to keep your screen on while the app is open, so it can function as an always-on clock. This requires no personal information.
• Clipboard — Used only when you tap the Share button, to copy your dilation data to your clipboard. Nothing is sent externally.

Data storage

Einstein Clock stores no data on any server. A few settings — such as your age, height, altitude, daily streak, and whether you've purchased the Pro upgrade — are saved locally on your device using your browser's local storage, so the app remembers them between visits. This information never leaves your device, and it is erased if you clear the app's data or uninstall it.

Third-party services

Einstein Clock does not use any third-party analytics services, advertising networks, crash reporting tools, or data brokers. There are no third-party SDKs embedded in the application.

Purchases and refunds

Einstein Clock offers an optional Pro upgrade as a one-time purchase of $1.99. All payments are processed by Google Play — we never see or store your payment details. Your purchase is tied to your Google account, so you can restore it on a new device by signing in with the same account. To request a refund or view your purchase, open the Google Play Store, go to Menu → Payments & subscriptions → Budget & order history, or visit play.google.com/store/account. Google's standard refund policy applies.

Children's privacy

Einstein Clock is suitable for all ages and is designed to be used in educational settings. Because we collect no personal information from any users, we collect none from children either. The app complies fully with the Children's Online Privacy Protection Act (COPPA).

Changes to this policy

If we ever change this privacy policy, we will update the effective date at the top of this page and post the revised policy here. Because we collect no data, any changes are unlikely to affect you in any meaningful way.

Contact