Effective 14 October 2026
Stackline is a block-stacking game published by Jahaz Services Inc. under the name JahazNova (“we”, “us”). This policy covers what information the app uses, what stays on your device, and what our advertising partner, Google AdMob, collects.
The short version
- No account and no sign-in. We run no servers for Stackline and receive none of your data.
- Your scores, coins, unlocks and settings stay on your device.
- The app shows ads from Google AdMob. Google collects some device information to serve, measure and (with your consent where required) personalise those ads.
Information stored only on your device
- Game progress: best scores, coins, streaks and the colours you have unlocked.
- Settings: sound, music, vibration and similar preferences.
- Reminders: if you allow notifications, the app schedules local reminders on your device. They are created by the app itself, not sent from a server, and you can turn them off at any time in your device’s notification settings.
This information stays on the device until you delete it in the app, clear the app’s data, or uninstall the app. If Android’s backup to your Google account is turned on, Android may include the app’s data in that backup, under Google’s terms; we cannot access it.
Advertising (Google AdMob)
Stackline is free and supported by ads from Google AdMob, a service of Google LLC. Some rewards, such as a revive or double coins, are offered for watching a video ad; watching one is always your choice. To show and measure ads and to prevent fraud, the Google Mobile Ads SDK may collect:
- Device identifiers, including your device’s advertising ID
- IP address and the approximate location it implies
- Device and app information: model, operating system, language, app version
- Ad interactions, such as ads viewed or tapped
- Diagnostic data, such as crash and performance information about the ad SDK
This information goes directly to Google and its advertising partners, not to us. How Google uses it is explained in How Google uses information from sites or apps that use its services and the Google Privacy Policy.
Your choices about ads
- EEA, UK and Switzerland: the app asks for your consent before personalised ads are shown. You can change your choice at any time from Privacy choices on the app’s home screen.
- US states with privacy laws: where a privacy message is shown, you can opt out of the “sale” or “sharing” of personal information for targeted advertising there or in Privacy choices.
- Everyone: you can reset or delete your advertising ID, or opt out of personalised ads, in your device settings (on Android: Settings → Google → Ads, or Settings → Security & privacy → Privacy → Ads). You will still see ads, but they will be less relevant.
What we do not do
- We do not sell your personal information, and we do not receive it.
- We do not use analytics or crash-reporting services of our own in Stackline.
- We do not ask for your contacts, precise location, microphone, camera, photos or files.
Children
Stackline is a general-audience app and is not directed at children under 13 (or the equivalent minimum age in your country). We do not knowingly collect personal information from children. If you believe a child has provided personal information through the app, contact us and we will help remove it.
Your rights
Depending on where you live (for example under Canada’s PIPEDA, the GDPR, UK GDPR or US state privacy laws), you may have rights to access, correct, delete or object to processing of your personal information. Because we hold no personal information from Stackline, most requests are answered by deleting the app’s data on your device. For information Google holds in connection with ads, use Google’s tools at myaccount.google.com or contact Google. You can always contact us with questions, and you may complain to your local data protection authority.
Security
Data stored by the app is kept in the app’s private storage, which other apps cannot read. Communication between the ad SDK and Google uses encrypted connections.
Changes to this policy
If we change this policy, we will post the new version here and update the effective date above. Significant changes will also be noted in the app’s release notes.
Contact
Jahaz Services Inc. (JahazNova)
5063 North Service Road
Burlington, ON L7L 5H6
Canada
Email: support@jahaznova.com
Website: jahaznova.com