SagaWise Reader

Privacy Policy

SagaWise Reader · Last updated: 18 October 2026

Who we are

SagaWise Reader is an Android app for reading books in a foreign language. It is developed and published by Arkhypov Oleksandr Oleksandrovych FOP, an individual entrepreneur registered in Ukraine ("we"). Contact: [email protected].

In short

Data stored only on your device

Books you import, your reading position, app settings, the words you looked up, their saved translations and your word statistics are stored in the app's private storage on your device. They are not uploaded to our server. They are deleted when you clear the app's data or uninstall it.

Anonymous account

On first launch the app signs in anonymously through Firebase Authentication, a Google service. This creates a random identifier that is not linked to your name, email or Google account. Our server uses it to create an internal user ID and session tokens, which the app keeps in the device's secure storage.

Translation

When you tap a word, the app sends our server the word, the sentence it appears in and the language pair. When you tap Check yourself, it sends the paragraph you are reading and the target language. Our server passes this text to a third-party AI language-model service, which returns the translation. The whole book is never sent, only the fragment you asked to translate.

For paragraph translations our server keeps only technical records: time, languages, request and response size and whether the request succeeded. The paragraph text is not stored. For word translations our server keeps the word, the context used for the request and the returned translation, linked to your anonymous user ID. We use these records to count usage against your plan's limits and to keep the translation service working.

Purchases

Subscriptions and one-time purchases are made through Google Play. We use RevenueCat to check your purchase status. RevenueCat receives your anonymous user ID and purchase information from Google Play. We never receive your payment card details.

Advertising

The app may show ads served by Google AdMob. AdMob may collect device information such as the advertising ID, IP address and interactions with ads, as described in Google's policy. You can reset your advertising ID or opt out of personalised ads in your Android settings.

Website

sagawisereader.com uses no cookies and no analytics. It stores only the second language you chose (for example, Polish next to English) in your browser's local storage, so the site opens in that language next time. You can clear it in your browser settings.

Who processes the data

Google (Firebase Authentication, AdMob, Google Play), RevenueCat and the AI translation service process data only for the purposes described above. We share data with no one else, except where the law requires it. Data is transferred over encrypted HTTPS connections.

How long we keep data and how to delete it

Server records are kept while your anonymous account is in use. To delete everything our server holds for your account, email [email protected] from any address and tell us that you want your SagaWise Reader data deleted. We will delete it within 30 days. Uninstalling the app deletes the data stored on your device.

Children

The app is intended for users aged 16 and over. It is not directed at children, and we do not knowingly collect data from anyone under 16. If you believe a child under 16 uses the app, email us and we will delete the data of that account.

Changes

If this policy changes, we will publish the new version on this page and update the date at the top.