Privacy Policy

Effective date: October 26, 2026

This Privacy Policy describes how the mobile game Cardvista: Jigsaw Solitaire ("the App", bundle / package com.boxapp.cardvista) handles your information. The App is developed and operated by an individual developer ("we", "us"). Contact: thaonp.dsvn@gmail.com.

1. No account, local game data

The App does not require an account or sign-in. Your progress, settings, coins, boosters, collection and daily challenge history are stored locally on your device and are deleted when you uninstall the App.

2. Data collected by third-party services

The App uses the following third-party SDKs, which may collect limited data automatically:

Google AdMob (advertising): advertising ID (IDFA on iOS if you allow tracking), device and OS information, IP address (approximate location) and ad interaction data, used to serve and measure ads and prevent fraud. See Google's Privacy Policy and how Google uses data from partner apps.
Google Firebase Analytics: pseudonymous app instance ID, device information and in-app events (for example level started or completed), used to understand how the game is played and to improve it.
Google Firebase Crashlytics: crash logs and device state at the time of a crash, used to fix bugs.
RevenueCat with Google Play Billing / Apple In-App Purchase: purchase and subscription history and a pseudonymous app user ID, used to deliver purchases, restore them and keep the VIP subscription status up to date. We never receive your payment card details; payments are processed by Google Play or the App Store. See RevenueCat's Privacy Policy.

The App also downloads picture and catalog files from our content server (hosted on Cloudflare). Such a request reaches the server with your IP address and standard HTTP headers, as for any web request; we do not link it to an identity and do not use it for advertising.

We do not collect your name, email address, contacts, precise location, or any photos from your device.

3. Advertising, consent and tracking

The App shows interstitial and rewarded ads served by Google AdMob. Where required by law (for example in the EEA, UK and Switzerland), a consent form (Google User Messaging Platform) is shown before ads are requested, and you can change your choice at any time in the App under Settings (privacy options), when that option is available for your region.

On iOS, the App asks for permission under Apple's App Tracking Transparency before using the advertising identifier. If you decline, ads are still shown but are not personalized with that identifier. You can change this in iOS Settings. On Android you can reset or delete your advertising ID in Settings → Google → Ads.

Purchasing Remove Ads or an active VIP subscription disables interstitial advertising. Rewarded videos are always optional.

4. Notifications and saving pictures

Reminders are local notifications scheduled on your device (for example about the daily challenge). They are not sent from a server and you can turn them off in the App or in system settings.
Saving wallpapers: if you choose to save a picture, the App adds it to your device's photo library. It only writes the file you chose; it does not read or upload your photos.

5. Children

The App is not directed at children under 13, and we do not knowingly collect personal information from children. If you believe a child has provided data through the App, contact us and we will help remove it.

6. Data security and retention

Data sent by the SDKs above travels over encrypted connections (HTTPS). Data held by Google and RevenueCat is retained according to their own policies. Local game data stays on your device until you uninstall the App.

7. Your rights and data deletion

Depending on your region, you may have rights to access or delete data held about you. Because the App has no accounts, the main identifiers involved are your advertising ID and the pseudonymous app instance / purchase ID. You can reset the advertising ID in device settings. To request deletion of data held by our service providers (for example analytics or purchase records linked to a pseudonymous ID), email thaonp.dsvn@gmail.com; we will respond within 30 days.

8. Changes to this policy

We may update this policy from time to time. Changes will be posted on this page with an updated effective date.

9. Contact

Questions about this policy: thaonp.dsvn@gmail.com