MG Puzzle Privacy Policy
MG Puzzle by Martin Grey LLP
Effective 30 October 2026
In short: you play without registering. We keep an anonymous game profile (coins, unlocked categories, hints) so that purchases can be restored; we never ask for your name. The only ads are optional reward videos that you choose to watch; they are shown by our ad partners, and personalised only with your consent. We do not send notifications. Photos you turn into puzzles stay on your device.
1. Who we are
MG Puzzle (the "App") is a jigsaw puzzle game operated by Martin Grey LLP ("we", "us"), a limited liability partnership registered in England and Wales under number OC457668, with its registered office at First Floor, Office 3, Hornton Place, London W8 4LZ, United Kingdom. We are the controller of the personal data described here. This policy should be read together with our Terms of Use. For any privacy question or request, write to [email protected].
2. Data we collect
Game profile
- When the App starts for the first time it creates a random identifier on your device and an anonymous game profile on our server. The profile holds your coin balance, the categories and pictures you have unlocked, your hints and the history of coin changes.
- The random identifier is kept in the device's secure storage (the iOS Keychain; on Android, the App's storage, which Android may include in your Google backup), so your profile is found again if you reinstall the App on the same device.
- If you want your coins on another device, write to us; we use the details you give us only to find and move your profile.
Earlier versions of the App
If you used MG Puzzle version 2.5 or earlier, your account on our old server is transferred to your new game profile so that you keep your coins and purchased categories:
- automatically, when you update the App on the same device;
- or, on another device, after you write to us from the email address you used in the old version (or tell us the Apple ID you signed in with). We use this information only to find and transfer your old account.
After the transfer, the old account is kept only as a record that it has been transferred.
Purchases
Coins and subscriptions (and "Remove Ads" in earlier versions) are bought through the Apple App Store or Google Play. We receive the store's purchase confirmation (product, transaction identifier, date, subscription status) to credit coins and unlock content. We never receive your payment details.
Advertising
The App shows no banners and no full-screen ads. The only ads are optional rewarded videos: a video plays only when you tap a button to watch one for a reward (a picture, coins or a gift). These videos are served through the CAS.AI mediation platform (Clever Advertising Solutions) and the ad networks it works with: Google AdMob, AppLovin, Unity Ads, ironSource, Liftoff Monetize (Vungle), Mintegral, CAS Exchange, Kidoz and Prado. The list can change as CAS.AI adds or removes networks. These partners may collect your device's advertising identifier (IDFA on iOS, Advertising ID on Android), IP address, device model, operating system, language, approximate location derived from the IP address, and ad interactions, to show and measure ads and to prevent fraud.
- On iOS, the advertising identifier is used only if you allow tracking in Apple's App Tracking Transparency prompt. You can change this later in iOS Settings → Privacy & Security → Tracking.
- On Android, you can delete or reset the Advertising ID, or opt out of ads personalisation, in the device's Google settings.
- In the UK, the EEA and other regions where the law requires it, the App asks for your consent before personalised ads are shown. You can change your choice at any time in the App's Settings ("Privacy choices", shown in these regions).
- Without consent, partners may still show non-personalised ads, using limited data for delivery, frequency capping and fraud prevention.
Photos and camera
When you create your own puzzle, the App uses the photo you choose or take only on your device. Your photos are not uploaded to us or to anyone else. The App asks for camera or photo access only when you use this feature.
Server requests
Like any online service, our server receives your IP address and basic technical data (App version, operating system) with each request. We use them only to deliver the service and to protect it from abuse; they are not stored in your game profile.
Support
If you email us, we use your email address and message to answer you.
What we do not collect
We do not collect your name, phone number, contacts, precise location or any sensitive personal data, and we do not sell personal data for money.
3. How we use data and our legal bases
- To run the game, keep your profile and restore your purchases — necessary to perform our contract with you (the Terms of Use).
- To show the rewarded videos you choose to watch, which fund the free version — our legitimate interests; for personalised ads and tracking, your consent.
- To transfer accounts from earlier versions and to answer support requests — our legitimate interests and performing our contract with you.
- To prevent fraud and abuse of the coin system — our legitimate interests.
4. Service providers
- Convex: database and file storage for game profiles, puzzle pictures and music (United States).
- CAS.AI and the ad networks listed above: advertising (various countries, mainly the United States and the European Union). Their own privacy policies apply to the data they collect.
- Apple (App Store) and Google (Google Play): purchases, under their own privacy policies.
5. International transfers
Our providers process data mainly in the United States. When personal data from the United Kingdom, the European Economic Area or Switzerland is transferred there, we rely on the safeguards the law recognises, such as the European Commission's Standard Contractual Clauses with the UK addendum, or the provider's certification under the EU-U.S. Data Privacy Framework and its UK extension.
6. How long we keep data
- Game profile and coin history: while you use the App, and for up to 24 months after your last activity, after which the profile is deleted.
- Purchase records: as long as needed for tax and accounting law, usually 6 years.
- Accounts from earlier versions that were not transferred: until we close the old service, then deleted.
- Support emails: up to 2 years.
7. Security
Data is sent over encrypted connections (HTTPS). Only a hash of your device identifier is stored on the server.
8. Your rights and choices
Depending on where you live, you may have the right to access, correct, delete or export your data, to object to processing or to withdraw consent. Requests are free; we answer within one month (45 days under US state laws) and may ask for details that help us find your data. You can delete your game profile in the App (Settings → "Delete my game data") or by writing to [email protected]. Deleting the profile removes your coins and unlocked content and cannot be undone; subscriptions and other store purchases can still be restored from the store. If you are unhappy with how we handle your data, you can complain to the UK Information Commissioner's Office (ico.org.uk) or to your local data protection authority.
9. US state privacy rights
If you live in a US state with a consumer privacy law (such as California, Colorado, Connecticut, Virginia, Texas or Oregon), you have the right to know what personal data we hold about you, to get a copy, to correct or delete it, and to opt out of "targeted advertising", "sale" or "sharing" of personal data. We do not sell personal data for money, but letting our ad partners use the advertising identifier for personalised ads may count as "sharing" or "targeted advertising" under these laws. To opt out, turn off tracking on iOS (Settings → Privacy & Security → Tracking) or delete the Advertising ID on Android; where the App shows "Privacy choices" in Settings, you can also refuse personalised ads there. To make any other request, write to [email protected]. If we refuse a request, you can appeal by replying to our answer; if you remain unhappy, you can contact your state's Attorney General. We will not treat you differently for using these rights.
10. Children
The App is intended for a general audience and is not directed at children under 13. We do not knowingly collect personal data from children. If you are under 16, or under the age of digital consent in your country, please ask a parent before agreeing to personalised ads. If you believe a child has given us personal data, contact us and we will delete it.
11. Changes to this policy
We will publish any update at www.martingrey.app and in the App with a new effective date. If a change significantly affects how we use your data, we will also tell you in the App before it takes effect.
12. Contact
Martin Grey LLP, First Floor, Office 3, Hornton Place, London W8 4LZ, United Kingdom. Email: [email protected].