Mahjong Postcards Privacy Policy

Effective date: November 12, 2026

1. Who is responsible

The data controller is Azor Games (Gabriel Azorín) (“we”), developer of the Android app “Mahjong Postcards” (Spanish name: “Mahjong Postales”). Contact: mahjong.postcards.support@gmail.com.

2. Summary

The game has no user accounts of its own: we do not ask for your email, phone number or password. The traveler name you choose in the game stays on your device.
Your progress and settings are stored only on your device.
The app shows ads from Google AdMob. To do so, Google may collect some device data (see section 4).
The app sends anonymous usage statistics (for example, boards won, mistakes, errors) to Google Firebase Analytics, with no name, email or precise location (see section 6).
If you are signed in to Google Play Games, your scores are sent to the Google Play Games Services leaderboards, with your player ID and the display name of your Play Games profile (see section 5). This is optional: the game works the same without signing in.
We do not use your precise location, contacts, photos, microphone, camera or files.
The app is not directed at children under 13.

3. Data stored on your device

The app stores in its private app storage (not accessible to other apps): unlocked levels and stars, per-level game statistics (attempts, hints, shuffles, undos), postcards and medals earned, in-game coins, daily challenge results (date, time and score), local best times and scores, the traveler name and look you choose, and your settings (language, sound, music, vibration, reduce motion, tutorial seen). This data is not sent to our servers (we have none) and is deleted when you uninstall the app or clear its data in Android settings. If you have Android/Google device backup enabled, your progress may be included in that backup (managed by Google) and restored when you reinstall the app or switch phones; otherwise it is stored only on your device.

4. Ads (Google AdMob)

The app is free and supported by ads from Google AdMob. Optional rewarded ads are offered (for example, watching a video to get a hint) and interstitial ads (full-screen ads shown between boards, paced at intervals and never during a board).

When loading and showing ads, the Google Mobile Ads SDK may collect and share with Google and its advertising partners: IP address (from which an approximate location is inferred), device and advertising identifiers (the Android advertising ID and App Set ID), interactions with ads and with the app, and diagnostics and performance data. Purposes: showing ads (personalized or not), measuring their effectiveness, analytics and fraud prevention. This data is transmitted encrypted. Google acts as an independent controller of that data; see how Google uses information from sites or apps that use its services and the Google Privacy Policy.

The app declares the advertising ID permission (com.google.android.gms.permission.AD_ID) and the Internet, network state and vibration permissions. The Google Mobile Ads libraries may add their own technical permissions (for example WAKE_LOCK, FOREGROUND_SERVICE and READ_BASIC_PHONE_STATE) to show and measure ads; the app does not request access to your location, contacts, camera, microphone or files.

Your choices:

Consent (European Economic Area, United Kingdom, Switzerland and other regions where required): we use Google’s User Messaging Platform (UMP) to ask for your consent before showing personalized ads. You can change it later with the “Privacy options” button in the app settings.
Advertising ID: on Android you can reset or delete it in Settings > Google > Ads, and limit ad personalization.
If you decline personalization you will still see ads, but not based on your profile.

5. Leaderboards (Google Play Games Services)

The app has two Google Play Games Services leaderboards: the daily challenge score and the total journey score. If your device is signed in to Google Play Games, the app signs in automatically and sends those two scores to Google. Google links them to your Play Games player ID and shows them on the leaderboards with the display name (gamertag) and avatar of your Play Games profile, which you manage with Google. The app does not send your traveler name, your progress or any other data. The Play Games Services SDK may also collect analytics and diagnostics data to improve its stability. Purpose: showing the leaderboards. This data is transmitted encrypted (HTTPS) and Google processes it under the Google Privacy Policy.

Your choices: this is optional; without a Play Games sign-in (or profile) the game works the same and nothing is sent. Other players see your display name and scores according to the visibility you choose in your Play Games profile (Everyone, Friends only or Only you). You can delete your games data from your Play Games profile or your Google Account.

6. Usage statistics (Firebase Analytics)

We use Google Firebase Analytics to learn how the game is played and to fix problems. Google processes this data on our behalf.

What the app sends: anonymous usage events. For example: a board won or abandoned, with its destination, the mistakes made and the stars earned; the start country you choose; outfits you buy with in-game coins; ads shown or closed; settings you change; and errors the app detects (an error code and a short hash, never text).

What Google collects on its own: a random Firebase installation ID, device model, Android version, app version, language, and an approximate location (country and city) deduced from your IP address. Through AdMob, Google may also use the advertising ID (see section 4).

What we do not send: your name, email, precise location, free text, contacts, photos, or your save file. We do not link the events to any account (there are none).

Consent: in the European Economic Area, the United Kingdom, Switzerland and other regions that require it, statistics are collected only after you accept in the consent form (UMP). If you refuse, nothing is sent. You can change your choice at any time with the “Privacy options” button in the app settings (shown where required). In any region you can also turn statistics off at any time in Settings > Privacy and legal > “Send anonymous statistics”: once off, the app stops sending them. Without that switch, outside the regions where consent is required, statistics are collected by default.

Purpose and retention: to analyze use and improve the game, never to sell data. Google keeps event data for 14 months (the retention period configured in Google Analytics). More information: data retention in Google Analytics, the Firebase privacy and security page and the Google Privacy Policy.

7. Who we share data with

We do not sell your data. Data is only transmitted to the providers listed above (Google AdMob, the User Messaging Platform (UMP), Google Firebase Analytics and Google Play Games Services) and only for the purposes described. Data may be processed on Google servers outside your country; Google provides safeguards for international transfers in line with applicable law.

8. Retention

Local data remains on your device until you uninstall the app or clear its data; if you have Android/Google device backup enabled, any backup copy made by Google is kept according to Google’s own policies. Data processed by Google is kept according to Google’s own policies and retention periods. Analytics events are kept by Google Analytics for 14 months (the retention period set in our Analytics project), and are then deleted automatically. Uninstalling the app or clearing its data resets the installation ID, so new events are no longer linked to the old ones.

9. Your rights

Depending on where you live (for example, the GDPR in the EU/EEA, or US state laws), you may request access, rectification, erasure, objection, restriction and portability of your data, withdraw consent, and lodge a complaint with your data protection authority. Because we have no accounts and do not store your personal data on our own servers, you can usually exercise these yourself (by clearing the app data, managing your advertising ID and consent, and deleting your Play Games data from your profile). Analytics events are not linked to your name or email, so we usually cannot tell which ones are yours; clearing the app data resets your installation ID. For any request, including data deletion, write to mahjong.postcards.support@gmail.com; we will reply within a reasonable time. Step-by-step instructions: how to delete your data. For data Google processes as its own controller, exercise your rights with Google.

10. Children

The app is not directed at children under 13 (or under the age of digital consent in your country) and we do not knowingly collect data from them. If you believe a child has given us data, write to us and we will delete it.

11. Security

Communications by Google SDKs are encrypted in transit. No system is completely secure, but we limit the data processed to the minimum necessary.

12. Changes to this policy

We may update this policy if the app changes (for example, when adding new features or services). We will publish the new version at this same address with its effective date.

13. Contact

Azor Games (Gabriel Azorín) · mahjong.postcards.support@gmail.com