TwentyOne: Blackjack Trainer · Last updated June 17, 2026
TwentyOne does not collect, store, transmit, or share any personal data. The app has no accounts, no sign-in, no analytics, no advertising, and no third-party SDKs or trackers.
Nothing. We — the developer — receive no information about you and have no way to see how you use the app.
Your settings (table rules, theme, chosen app icon), your practice statistics (accuracy and which hands you’ve missed), and whether you’ve unlocked TwentyOne Pro are stored only on your device. They never leave it, and we cannot see them. Deleting the app removes this data.
TwentyOne offers an optional one-time in-app purchase, TwentyOne Pro ($4.99), which unlocks additional features. Purchases are processed entirely by Apple through the App Store using Apple’s in-app purchase system. We never see or receive your payment details (such as card numbers or billing address). Apple handles the transaction and any associated data under Apple’s Privacy Policy. The app only stores a simple on-device flag recording whether Pro has been unlocked.
TwentyOne has no servers of its own and works offline for all training features. It connects to the network only to communicate with Apple’s App Store — to show the Pro price, complete a purchase, and restore a previous purchase. It makes no other network requests.
Because the app collects no data from anyone, it collects no data from children.
If this policy ever changes, the updated version will be posted on this page.
Questions? Email jtaddeohpu@gmail.com.