Last updated: 4 September 2026
This policy explains what Cardstock does with your information. The short version: the app keeps everything on your phone, and the only data leaving your device is what Google's advertising service collects in order to show ads.
Cardstock is developed by Tyler Lance, an individual developer based in Arizona, United States. You can reach us at snarfwaffle92@gmail.com.
We do not collect, store, or transmit any personal information.
Cardstock has no account system, no sign-in, and no server of its own. We cannot see your games, your records, or anything else about you.
The app saves the following locally, on your phone only:
Your game records and streaks for each game
Your current unfinished game, so it can be resumed
Your chosen card design and sound preference
Your hint balance and whether you have purchased Premium
This information never leaves your device. It is removed when you uninstall the app, and you can clear it at any time using Reset progress in the app's menu.
Cardstock shows ads supplied by Google AdMob. To do this, Google's advertising service may collect and use:
Your device's advertising ID
Device information such as model, operating system version, and language
Approximate location derived from your IP address
Information about how you interact with ads
This collection is carried out by Google, not by us. We never receive this information, and we cannot identify individual users from it.
Google's use of this data is governed by their own policies:
Google Privacy Policy: https://policies.google.com/privacy
How Google uses information from partner sites and apps: https://policies.google.com/technologies/partner-sites
You can reset or delete your advertising ID at any time in your device settings, under Settings → Google → Ads.
If you are in the European Economic Area, the United Kingdom, or Switzerland, the app will ask for your consent before personalised ads are shown, and you may change that choice at any time. Users in certain US states may be offered similar choices.
Purchasing Premium removes all ads.
Cardstock offers optional in-app purchases handled entirely by Google Play. We never see or store your payment details. Google's handling of those transactions is covered by their own privacy policy.
Cardstock is not directed at children under 13, and we do not knowingly collect information from them. The app is rated for a general audience and contains no chat, no user-generated content, and no way for users to contact one another.
Reset advertising ID: device settings, as described above
Remove ads entirely: purchase Premium within the app
Clear all stored data: use Reset progress in the app's menu, or uninstall the app
Change consent choices: available in the app where required by law
If this policy changes, the updated version will be posted at this address and the date at the top will be revised. Continuing to use the app after a change means you accept the revised policy.
Questions about this policy can be sent to snarfwaffle92@gmail.com.