Privacy policy

Last updated: November 4, 2026

1. Data controller

Sendero Eterno (working title) is a personal project by Javier López Morado, with no company behind it, who is the controller of your data. For any questions about your data, you can write to izuhapps@gmail.com.

2. What data we collect

Only if you use the online features (Daily challenge, Weekly challenge, Leaderboard and Friends) or earn an achievement: an anonymous identifier (Firebase Authentication UID, without your real name, email or phone); your display name, auto-generated (e.g. "Viajero1234") or one you choose; your results in each challenge (day reached, laps, tiles traveled, score, gold, materials, whether you retreated, start and submission times, and the app version); your achievements (free mode ones too) and Daily challenge streak; the leaderboard frame you choose; your friend code and the players you follow. If you link a Google account in Settings, also that account's email and identifier, stored by Firebase Authentication. If you send feedback: the text you write, that anonymous identifier, the date and the app version. Only if you turn on “Send error reports” in Settings (off by default), when the app crashes or hits an error, in any mode (free mode too): a technical report with the error type and its stack trace, the app version, the device model and Android version, memory and storage state, and an installation identifier generated for this purpose. If you report another player's name: your anonymous identifier, the reported player's, their display name at that moment, the leaderboard period and the date.

3. What we do NOT collect

There are no ads or usage analytics, only the crash reports described in section 2 if you turn them on, and the app doesn't access your contacts, location, camera or microphone. Free mode works offline: your camp, resources, current run and settings are stored only on your device and never leave it; the only thing that can be sent without prior connection is a crash report, if you turned reports on and there is one. The game's website uses no cookies or analytics.

4. Where it's stored

Online feature data and feedback are stored in Cloud Firestore, and crash reports in Firebase Crashlytics, both part of Google Firebase, which processes them on the developer's behalf and may host them outside the European Union under the safeguards of its data processing terms. To provide the service, Firebase also processes technical connection data such as your IP address.

5. What's public

Any player can see your display name, the frame you chose and your results (day, laps, tiles, score, gold, materials and whether you retreated) on the daily and weekly leaderboards. Anyone with your friend code can follow your results. Your profile (achievements, streak and who you follow) is visible only to you, and no player can read feedback or the email of the linked Google account. Crash reports are not public: only the developer sees them, from the Firebase console, like all other data.

6. Retention and your rights

Data is kept while the project remains active; older results stop being shown in the app but are not deleted automatically. You can request access to, correction or deletion of your data, or object to its processing, by writing to the contact in section 1. Include your display name and friend code (in the app, under Leaderboard → Friends), or the Google account email if you linked one, so it can be found. If you think your rights have not been respected, you can complain to your country's data protection authority (in Spain, the AEPD). In the app, from Settings → Account → 'Delete account', you can delete your profile, your friend code and your anonymous or linked Google account, and your name and frame are removed from your results of the last few days and weeks (which stay as 'Deleted player' so the leaderboard doesn't change). Older results keep the name and suggestions you sent are not deleted from the app: to have them deleted, write to the contact in section 1. Crash reports use an installation identifier and are not tied to the account. Name reports are not public (only the developer sees them) and are deleted after 90 days. When you delete your account, the reports you made are deleted; those your name received are kept until that period ends.

7. Minors

The app doesn't ask for your age or collect personal data beyond what is described above. If you are under your country's minimum age of digital consent (14 in Spain), only use the online features with permission from a parent or guardian.

8. Changes to this policy

If this policy changes in a meaningful way, the 'Last updated' date will change.