Privacy Policy
Last updated: 18 May 2026
Logia is built to keep your data on your device. This policy explains exactly what is collected, what isn't, and who has access to what. If anything here is unclear, email ekaterina.gasparian@gmail.com.
Data that stays on your device
All of your reading state lives in files on your phone and is never uploaded to any server. This includes:
- Your vocabulary state (every word you've seen, tapped, or marked, and how well Logia thinks you know it)
- Your reading progress in each book (the page you're on, paragraphs you've seen)
- Your CEFR self-declared level and quiz answers
- The list of books you have open
None of this leaves your device. It is not synced to a Logia server (there is no Logia server). If you delete the app, this data is gone.
Anonymous usage analytics
To understand which features people use, Logia sends a small number of anonymous events to TelemetryDeck, a privacy-focused analytics provider based in Germany. These events include things like "a book was opened", "a page was turned", "a word was tapped", and the time you spent in the app per session.
What is not sent:
- Your name, email, or any identifier that could be tied back to you
- Your IP address (TelemetryDeck does not store it)
- Advertising or marketing identifiers (no IDFA, no cookies)
TelemetryDeck assigns a one-way hashed identifier per app install so that repeat sessions from the same install can be counted as one user, but this identifier cannot be reversed into anything that identifies you. You can read TelemetryDeck's own privacy policy at telemetrydeck.com/privacy.
How to turn analytics off
In a future version of Logia there will be an in-app "Help improve Logia" toggle that disables analytics entirely. Until then, the kill switch exists in code (events are silenced at the source) but is not yet wired to a user-facing setting. If you'd prefer not to send analytics in the meantime, email ekaterina.gasparian@gmail.com and we'll add you to the build that has it off.
Third parties
- Apple
- If you installed Logia via the App Store or TestFlight, Apple receives standard install and crash data on Logia's behalf. See apple.com/legal/privacy.
- TelemetryDeck
- Anonymous product analytics as described above. See telemetrydeck.com/privacy.
- Project Gutenberg
- The books bundled with Logia are sourced from Project Gutenberg and its German sibling projekt-gutenberg.org. These sources are not contacted by the app at runtime — books ship inside the app bundle.
Children
Logia is rated 4+ and does not knowingly collect any personal data from anyone, including children.
Changes to this policy
If this policy changes in a material way, the "Last updated" date above will change and a note will appear on the app's next launch.
Contact
Questions or complaints about this policy: ekaterina.gasparian@gmail.com.