Plumstone Privacy Policy
Plumstone (mahjong solitaire for Android, package com.xdss.mahjong) by XDSS. Effective 13 November 2026.
Plumstone is a single-player puzzle game. It has no accounts, no sign-in and no server of its own, and it never asks you to type personal information. This page explains what the app keeps on your phone and what the Google services inside it collect.
What the app stores on your device
- Your game progress: journey levels, stars, daily challenge results and streaks, statistics, and the board you are playing.
- Your settings: sound, haptics, themes, tile faces and similar choices.
- Whether you bought Premium, and your ad consent answer.
This data stays on your device. If Android backup is turned on for your phone, your progress and settings may be included in your own Google device backup, which Google stores for you; your Premium status and consent answer are excluded from backups. We (XDSS) never receive any of it.
Third-party services
| Service | What it does and collects |
|---|---|
| Google Mobile Ads (AdMob) | Shows ads to players without Premium. It can collect the advertising ID, device information (model, OS version, language), app interactions with ads, and an approximate location derived from the IP address, to show, measure and limit ads and prevent fraud. In the EEA, UK and Switzerland ads are personalised only if you agree. How Google uses data in ads. |
| Google User Messaging Platform | Shows the consent form where the law requires it and stores your choice on the device. Google Privacy Policy. |
| Google Analytics for Firebase | Usage statistics: which screens are opened and game events such as a level started or finished, hints used or a purchase made, plus device information and app-instance identifiers. Events never contain anything you created or typed (the app has no text input). It only runs after the consent form allows analytics, and you can turn it off at any time in Settings > Usage statistics, which also resets the analytics data on your device. Firebase privacy. |
| Google Play Billing | Handles the one-time Premium purchase. Payment happens entirely in Google Play; the app only learns whether you own Premium and never sees your payment details. Google Payments privacy notice. |
Data sent to these services travels encrypted (HTTPS). We do not sell personal data.
Your choices
- Privacy choices: where the consent form applies, Settings > Privacy choices lets you change your ad consent at any time.
- Usage statistics: Settings > Usage statistics turns analytics off.
- Advertising ID: you can reset or delete it in your phone's settings (Settings > Privacy > Ads, or Google > Ads, depending on the device).
- Premium removes all ads; Google Mobile Ads is then not started at all.
Permissions
- Internet and network state: to load ads, send usage statistics and talk to Google Play for purchases.
- Billing: for the Premium purchase through Google Play.
- Advertising ID and ad services (added by Google Mobile Ads): to show and measure ads as described above.
The app does not ask for location, contacts, camera, microphone, storage or notifications.
Children
Plumstone is not directed at children under 13 (or the minimum age in your country), and we do not knowingly collect their data.
Keeping and deleting data
Uninstalling the app, or clearing its data in Android settings, deletes everything it stored on your device. Data held by Google services is kept and deleted under Google's own policies linked above; for analytics you can also turn off Usage statistics, which resets the analytics data on the device.
Changes
If this policy changes, the new version is published at this address with a new effective date, and important changes are mentioned in the app's release notes.
Contact
XDSS, sebiradutoiu@gmail.com