Your learning progress and sets stay on your device. Something leaves it in only two places: RevenueCat checks your purchase of the full version with a random ID, and if you turn on the optional iCloud sync, your progress is stored in your private iCloud. No account, no advertising, no tracking.

The app does not need an account, and we do not run any servers for it. The app contains no advertising, no tracking, and no analytics.

Your learning progress, your sets, ignored compounds, and your settings are stored on your device. If you use iCloud Backup or back up your device to a computer, iOS includes this data in the backup, as it does for any app; we have no access to it.

With the full version, you can turn on iCloud sync in the settings (it is off by default). The app then also stores your learning progress, your sets, ignored compounds, and your daily streak in your private iCloud key-value storage, so they match on all devices signed in with the same Apple Account. Apple provides this storage; we have no access to it, and nothing is sent to us. Your settings stay on each device. If you turn sync off, the app stops syncing; the copy in iCloud remains part of your iCloud data with Apple.

If you turn on the daily reminder, the app schedules a local notification on your device. No data is sent to us or to a push service for this. You can turn the reminder off at any time in the app or in the iOS settings.

Each compound's detail page links to its public page on PubChem, a database of the U.S. National Library of Medicine. The settings link to our other apps in the App Store. These links open outside the app, and the privacy policy of the respective provider applies there.

If you report an error or send feedback from the app, your mail app opens with a prepared message containing the app version, the platform, and, for error reports, the name of the compound. We only use your message and e-mail address to answer your request.

You get the app through the Apple App Store. Apple is responsible for download, payment, and updates; we have no access to that data. Apple's privacy policy applies: https://www.apple.com/legal/privacy/

If you have turned on "Share with App Developers" in the iOS settings, Apple provides us with anonymous crash reports and usage statistics. They do not identify you.

The payment is handled by Apple. To unlock purchases on all your devices and restore them, the app uses the service RevenueCat. RevenueCat receives a random App User ID that is not linked to your name or Apple ID, information about your purchases (e.g., product, date, and store transaction), and technical device information (e.g., app version, operating system version, and store country). As with any internet connection, your IP address is transmitted for technical reasons.

Content you create in the app is never transmitted. The data is not used for advertising or tracking.

The provider is RevenueCat, Inc., 1032 E Brandon Blvd #3003, Brandon, FL 33511, USA. RevenueCat processes the data on our behalf (Art. 28 GDPR). Because the data reaches the USA, the transfer is safeguarded by the European Commission's Standard Contractual Clauses (Art. 46(2)(c) GDPR). RevenueCat's privacy policy: https://www.revenuecat.com/privacy

Whatever happens only on your device or in your private iCloud does not reach us; we do not process that data.

Checking and restoring your purchases via RevenueCat is based on Art. 6(1)(b) GDPR (performance of the purchase contract). That the app also checks the unlock status when you have not bought anything, and that your IP address is transmitted for technical reasons, is based on Art. 6(1)(f) GDPR; our legitimate interest is a reliable unlock on all your devices.

If you e-mail us, we process your address and message to answer you (Art. 6(1)(b) GDPR for questions about a purchase, otherwise Art. 6(1)(f) GDPR).

What the app stores on your device stays there until you delete it in the app or remove the app. Data in your iCloud can be deleted in your device's iCloud settings.

RevenueCat keeps purchase data as long as it is needed to manage your purchases; on request, we have it deleted unless statutory retention obligations apply.

We delete e-mails to us once your request has been resolved, unless statutory retention obligations apply.

You have the right to access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20), and to object to processing based on legitimate interests (Art. 21). You can withdraw consent at any time with effect for the future (Art. 7(3)).

Since we do not keep accounts and the app does not identify you, we often cannot attribute data to a person (Art. 11 GDPR). Write to us anyway; we are happy to help.

You can lodge a complaint with a data protection supervisory authority (Art. 77 GDPR), for example the one responsible for us: the data protection authority of Lower Saxony (LfD Niedersachsen), Prinzenstraße 5, 30159 Hannover, Germany, https://www.lfd.niedersachsen.de

Nikita Aurelian Schulz (PODSchu). The full address is in the legal notice (Impressum) on this page.

For questions about data protection: contact.schulzpod@gmail.com