Most privacy pages are written to make a long list of data collection sound reassuring. This one is short, because the list is short.
We run no server
Stack Cards Sort has no advertising SDK and no networking code of its own. We do not run a players database. There is no account with us to create or log in to; the only sign-in is Apple’s optional Game Center, and Apple runs that account.
That single architectural decision answers most of the questions a privacy policy usually has to dance around. We cannot lose your progress in a breach, because we never have it.
What we do measure
The game does send two things off your device, both to Google Firebase:
- Gameplay statistics — events such as a level started or finished, a hint used, the daily puzzle played, the Pro screen shown or a purchase made, plus basic device details like the model and iOS version, and a rough location that Google estimates from your connection.
- Crash reports — what the app was doing when it crashed, so we can fix it.
Both are tied to a random ID the app creates for itself — not your name, not your Apple ID and not the advertising identifier. We use them to see which levels are too hard and what breaks. They are not used for ads, not combined with other data and not sold. Delete the app and the ID goes with it. The privacy policy lists exactly what is sent and how long it is kept.
What is written to your device
Your progress is stored on your iPhone as ordinary app data: which levels you have cleared, how many stars each one earned, your settings, your hint balance and whichever level you were part-way through when you last closed the app. That is it.
It never leaves the device. Delete the app and it goes with it — there is no copy on our side to restore from, and no “are you sure, we can recover this for thirty days” safety net. We think that trade is worth stating plainly rather than burying.
What Apple handles
Two things happen outside our reach, and both belong to Apple rather than to us.
Purchases. If you buy the Pro unlock, Apple processes the payment. We never see your card, your name or your address. What reaches us is an aggregated sales report with no way to trace a purchase back to a person.
Game Center. This one is optional and off unless you use it. If you do, Apple stores your total-star leaderboard entry, your achievements, and a snapshot of your progress so it can follow you to another device. Apple is the controller of that data, under Apple’s terms; you manage it in iOS Settings under Game Center. Skip Game Center entirely and the game works exactly the same.
No tracking identifier
You will never see the App Tracking Transparency prompt in Stack Cards Sort, because we do not track you. No IDFA, no advertising profile, no cross-app measurement. The app’s privacy manifest declares no tracking, and it lists the statistics and crash reports above as data that is not linked to you.
The website is a separate question
This site is not the game. It runs on Cloudflare, which keeps request logs for around thirty days, and it will set analytics cookies only if you accept them in the banner. The contact form emails us what you type so we can reply. All of that is set out in full in our privacy policy.
Different systems, different answers. It seemed worth keeping them apart.