Mahjong Calm

Mahjong Calm: Tile Solitaire (“the app”, “we”, “us”) is a relaxing mahjong solitaire game, published by Peidus Products OÜ. This policy explains how the app handles your data. In short: the app is private by design. It needs no account, the puzzles are generated on your device, and your progress stays there. The only information that leaves your device is anonymous usage analytics, the data an ad needs to be served to free players, and the data needed to process an optional purchase.

Information we do not collect

• We do not collect your name, contacts, or location.
• No account, sign-in, or registration is required to use the app.
• We ask for your email address only if you write to us from inside the app — see If you contact support.
• Whether the advertising identifier is used to personalise ads is your choice — see Advertising below.

Stored only on your device

Your game progress, statistics, and settings are stored locally on your device. This data never leaves your device, is not transmitted to us, and is permanently removed when you uninstall the app.

Anonymous usage analytics

We use PostHog (hosted in the EU) to understand how the app is used so we can improve it. We attach a random identifier generated on your device that is not derived from any device or personal identifier and does not identify you. We record product events such as opening the app, starting and completing a board, using a hint or shuffle, viewing the upgrade screen, and completing a purchase, along with coarse, non-identifying device and diagnostic information. No personal identifiers are collected. See PostHog’s Privacy Policy.

The same service also delivers a few remote settings (feature flags) to the app — for example, which optional features are enabled. These requests use the same anonymous identifier and contain no personal information. The anonymous profile may include a few non-identifying properties, such as which app in our family you are using and your purchase status (free or premium). We do not use this data to identify you.

Advertising (free version only)

Free players may see ads served by Google AdMob. You choose whether those ads are personalised.

The first time you open the app, and before any ad is requested, you are asked. In the European Economic Area, the UK and Switzerland you are shown Google’s consent form; on iOS you are also shown Apple’s App Tracking Transparency prompt. If you agree, your advertising identifier may be used to personalise ads and is shared with Google for that purpose. If you decline, ads are served non-personalised — AdMob still receives standard, device-level signals in the ad request, which is what allows an ad to be shown at all and to be frequency-capped.

You can change your choice at any time in Settings → Ad privacy choices (shown where consent applies), and on iOS in the system Settings under Privacy & Security → Tracking. Premium players see no ads. See Google’s Privacy Policy.

Purchases

The app offers an optional premium upgrade (as a subscription or a one-time lifetime purchase). Payment is processed by the Apple App Store or Google Play, and your entitlement is verified and stored by Substation, our own purchase-verification service, operated by Peidus Products OÜ. To enable and restore purchases, Substation processes:

• an anonymous app-user identifier generated on your device;
• purchase and transaction details and your purchase status;
• basic device and platform information needed to validate the purchase.

This information is used solely to deliver and restore your purchases and premium access. It is never used for advertising. Your actual payment details (card, billing information) are handled entirely by Apple or Google; we never see or store them.

If you contact support

The app has a “Help & support” form. If you choose to use it, we receive the email address and the message you write, so that we can reply. This is the only case in which we hold an email address for you. We use it to answer you and for nothing else — never for advertising, and it is not shared with anyone. Ask us at any time and we will delete it.

Children

The app is intended for a general audience and is not directed at children under 13.

Your rights

Because your progress and settings are stored only on your device, you can erase them at any time by deleting the app. For purchase-related data held by Substation, or an email address you sent us through the support form, you may request access or deletion by contacting us. Depending on where you live (for example, the EEA/UK under the GDPR, or California under the CCPA), you may have rights to access, correct, or delete your personal data. Our analytics use only anonymous data and are not tied to your identity, and you can revisit your advertising choice at any time as described under Advertising.

Changes to this policy

We may update this policy from time to time. The “last updated” date above will reflect any changes.

Contact

Questions or requests: support@peidusproducts.com