Kristalis (iO Digital Studio) is a single-hero tower-defense / survivor game. This policy explains, plainly, what data is processed while you play. Last updated: July 2026.
You don't need to register to play Kristalis. We do not ask for or collect your name, email, phone number or similar personal information.
Game progress such as gold, gems, hero level, gear and settings is stored only in your device's local storage. This data is not sent to our servers and is removed from your device when you uninstall the app.
We may show optional rewarded ads served by Google AdMob. AdMob may process data such as an advertising identifier (Advertising ID / IDFA) and general device information to serve, cap and measure ads. Kristalis is configured to request non-personalized ads from AdMob. For how Google processes this data: policies.google.com/privacy.
The game offers optional purchases and a subscription (premium, gem/gold packs, speed subscription). Purchases are handled through Apple App Store / Google Play billing and our purchase-management provider RevenueCat. Purchase data is processed by these providers to validate and restore transactions. Your card / payment details are handled directly by the stores and are not shared with us.
Kristalis is not directed to children under 13, and we do not knowingly collect data from them.
You can delete your local game data by uninstalling the app. For any question or request, email hello@iodigitalstudio.com.
last updated — july 2026