Privacy Policy

Last updated: September 24, 2026

This Privacy Policy describes how the mobile game Tallo: Stack Tower Blocks (published on Google Play as Stack Tower: Tallo Block Game, formerly Box Stacker; "the app", "we", "us") handles information when you use it. It covers both the iOS and the Android version. We designed Tallo to collect as little personal data as possible. Where a section applies to only one platform, it says so.

1. Information stored on your device

The app stores game preferences and progress locally on your device: best scores, run history, coins, unlocked themes, daily reward progress, rank and experience, achievements, language, difficulty, and sound, music and vibration settings. This information stays on your device and is not transmitted to us, except as described below.

2. Game services

On Android, Tallo uses Google Play Games Services for sign-in, leaderboards and achievements. If you sign in, your scores and achievement progress are submitted to Google and displayed under your Play Games player name. Play Games is operated by Google and governed by Google's privacy policy.

On iOS, Tallo uses Apple Game Center for the same purpose. If you are signed in to Game Center on your device, your scores and achievement progress are submitted to Apple and displayed under your Game Center player name. Game Center is operated by Apple and governed by Apple's privacy policy.

On both platforms signing in is optional and you can sign out at any time in your device settings. The game remains fully playable without it.

3. Global leaderboard

To show a worldwide ranking, the app stores leaderboard entries in Google Firebase (Cloud Firestore). For this feature the app processes:

• Your player display name — from Google Play Games on Android, or Apple Game Center on iOS — as shown to other players on the leaderboard.
• Your best scores, the game mode and difficulty they were achieved on, and the date.
• An anonymous player identifier issued by Firebase Authentication, used only to associate scores with your entry.

We do not ask for your name, email address, phone number or any account credentials. The global leaderboard is only active when you are signed in to Play Games or Game Center.

4. Advertising

Tallo is free to play and shows ads served by Google AdMob: banner ads on menu screens and after a round, interstitial ads between rounds, an app-open ad when you return to the game, and optional rewarded ads that you choose to watch for an in-game bonus (such as continuing a run or doubling your coins).

To serve and measure ads, AdMob may collect device identifiers (including the advertising ID on Android and, on iOS, the advertising identifier only if you allow tracking in the App Tracking Transparency prompt), approximate location derived from your IP address, and ad interaction and diagnostic data, in accordance with Google's privacy policy and how Google uses information from apps that use its services.

Where required by law (for example in the EEA, the UK and Switzerland), the app asks for your consent through Google's User Messaging Platform consent message before personalised ads are shown. You can change your choice at any time in Settings → Privacy choices. On Android you can also reset or delete your advertising ID in your device settings under Settings → Privacy → Ads. On iOS you can allow or deny tracking under Privacy & Security → Tracking.

5. Analytics and crash reports

The app uses Google Firebase Analytics and Firebase Crashlytics to understand how the game is played and to fix crashes. This includes events such as rounds started and finished, scores, settings changes, screens viewed, ad and purchase events, and technical crash data (device model, operating system version, app version). This data is not used to identify you personally and is not sold.

6. Tallo Premium subscriptions

Tallo Premium is an optional auto-renewing subscription (monthly or yearly) that removes all ads, gives you a free revive in every run and doubles the coins you earn.

On Android, payments are processed by Google through Google Play Billing, and you can manage or cancel the subscription in your Google Play subscriptions. On iOS, payments are processed by Apple through the App Store, and you can manage or cancel it in your Apple Account settings.

We do not receive or store your payment details. The app only checks your subscription status with the store, and purchase events (such as the plan chosen) are recorded in Firebase Analytics as described above.

7. Notifications

If you allow notifications, the app schedules an evening reminder on your device (for example about your daily reward, your streak or your best score), only on days you haven't played. These reminders are created on your device and are not sent through our servers.

If you use the global leaderboard, the app can also notify you when another player passes your score in the global top 50. For this, the app stores in Cloud Firestore, together with your anonymous player identifier: a Firebase Cloud Messaging token for your device, the app language, your time zone (so we never notify you at night) and whether notifications are turned on. You can turn notifications off at any time in the app under Settings → Notifications, which also stops these server notifications, or in your device settings.

8. Children's privacy

Tallo is not directed at children. Its target audience is 13 years and older. The app does not knowingly collect personal information from children and does not ask for any personal information inside the app.

9. Data retention and deletion

Locally stored data is removed when you delete the app. To request deletion of your global leaderboard entry and of the notification token associated with it, email us at timofticavld@gmail.com from any address and include your player display name as it appears on the leaderboard. We delete the entry within 30 days and confirm by reply. Play Games data can be managed in your Google Account, and Game Center data in your Apple Account. Notification tokens are deleted when they are no longer valid. Analytics data is retained by Firebase for up to 14 months.

10. Third-party services

The app uses Google AdMob and Google's User Messaging Platform, Google Firebase (Authentication, Cloud Firestore, Cloud Messaging, Analytics and Crashlytics), and — depending on the platform — Google Play Games Services and Google Play Billing on Android, or Apple Game Center and Apple StoreKit on iOS. These providers may process technical request data (such as IP address and device information) as part of delivering their services, in accordance with their own privacy policies.

11. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be reflected by the "Last updated" date above.

12. Contact

If you have questions about this Privacy Policy, contact us at timofticavld@gmail.com.