Rueda de Letras privacy policy
Last updated: November 1, 2026
Rueda de Letras is a Spanish-language word game for Android. This policy explains what data it handles, why, and what your rights are.
1. Who we are
Carlos J. Figueredo González (KarFiGo). Contact for any privacy question: apps.karfigo@gmail.com.
2. Your game stays on your phone
Rueda de Letras has no accounts or sign-in, and we use no servers of our own. Your progress (level, coins, words found, daily challenge streak) and your settings (sound, vibration, reminder) are stored only on your phone. We don't send them anywhere. If you uninstall the game or clear its data, they are lost.
The game works offline: the levels and the dictionary are bundled inside the app.
3. Daily challenge reminder
If you allow notifications, the game schedules on your own phone a daily reminder around 8 p.m. when you haven't played that day's challenge yet. It is generated on the phone: we use no push notification services and send no data. You can turn it off in Ajustes (Settings) → Recordatorio del reto diario or in Android settings.
4. Ads
The game shows ads from Google AdMob: a banner on the home and chapters screens, an occasional full-screen ad between levels (never during play) and optional rewarded ads to get hints or coins. AdMob may use your device's advertising ID and technical data (such as device model, Android version, IP address and approximate region) to show and measure ads and to prevent fraud.
In the European Economic Area, the United Kingdom and Switzerland, a consent form (Google's UMP platform) is shown before any ad is requested. You can change your choice at any time from Ajustes → Opciones de privacidad. If you don't consent, the ads you see will not be personalised.
More information: how Google uses data from apps that use its services.
5. Usage and crash statistics
To learn which levels are hard and to fix bugs, the game uses Google Firebase Analytics and Firebase Crashlytics. Analytics receives anonymous usage data linked to a random installation ID: levels started and completed (with time, hints used and bonus words), chapters and daily challenges completed, hints and rewarded ads, your answer to the rating prompt, plus device model, Android version and approximate region. If the game closes because of an error, Crashlytics receives a technical crash report. Neither includes your name or email, and neither is used to show you ads.
In the European Economic Area, the United Kingdom and Switzerland, Analytics stores nothing until you answer the consent form, and only to the extent you accept; you can change it from Ajustes → Opciones de privacidad.
6. Who processes the data
The only data that leaves your phone is the data used by Google AdMob for ads and Google Firebase for statistics and crash reports, as explained above. Google acts under its own policies; international transfers may take place under the Standard Contractual Clauses or the EU-US Data Privacy Framework. We do not sell your data.
7. Your rights
Since your game never leaves your phone, we hold no data about you to access, correct or delete: to remove it, just clear the app's data or uninstall it. For ad data you can change your consent from Ajustes → Opciones de privacidad, reset your advertising ID in Android settings or write to apps.karfigo@gmail.com. If you believe your data is not handled correctly, you can complain to the data protection authority in your country (in Spain, the Agencia Española de Protección de Datos, aepd.es).
8. US residents
We do not sell your personal information. Advertising partners (Google AdMob) may use device identifiers to show ads, which some laws consider "sharing" data for targeted advertising. You can opt out from Ajustes → Opciones de privacidad or from Android's ads settings.
9. Children
The game's content is suitable for all audiences, but the game is not directed at children under 13 and we do not knowingly collect data from them.
10. Word list credits
The words come from the RLA-ES dictionary (MPL license) and the FrequencyWords frequency lists (CC BY-SA 4.0). See «Créditos y licencias» in the app.
11. Changes
If we change this policy, we will publish the new version here with its date and, if the change is significant, let you know in the app.