Support

Pro is tied to the store account that bought it: your Apple ID on iPhone and iPad, or the Google account you use in Google Play on Android. It should restore automatically when you open the app on a device signed in to that account. If it doesn't appear, try the following:

1. Make sure the device is signed in to the same Apple ID or Google account used for the original purchase.
2. Close and reopen the app.
3. Check your internet connection and try again.
4. Open Settings in the app, tap Upgrade to Pro, then tap Restore at the bottom of the screen.

Purchases do not transfer between the App Store and Google Play.

The App Store and Google Play may occasionally be slow to verify purchases. If the issue persists, contact us with your purchase details.

Subscriptions are managed by the store you subscribed through, not through our app. To cancel:

On iPhone or iPad
1. Open Settings.
2. Tap your name at the top, then tap Subscriptions.
3. Find 21 Trainer and tap Cancel Subscription.

You can also manage subscriptions at apps.apple.com/account/subscriptions.

On Android
1. Open the Google Play app.
2. Tap your profile icon, then Payments & subscriptions, then Subscriptions.
3. Select 21 Trainer and tap Cancel subscription.

You can also manage subscriptions at play.google.com/store/account/subscriptions.

Your Pro access will continue until the end of your current billing period.

To reset all your training data:

1. Open 21 Trainer.
2. Go to the Settings tab.
3. Scroll down and tap Reset All Statistics.
4. Confirm the reset.

This will clear all session history, hand records, and accuracy data. This action cannot be undone.

No. 21 Trainer is an educational tool designed to help you learn blackjack strategy. No real money is wagered, won, or lost at any time. Virtual chips used in the Bankroll Simulator have no real-world monetary value and cannot be redeemed or exchanged.

Training results do not guarantee performance at real casino tables. This app is intended for educational and entertainment purposes only.

21 Trainer includes 9 preset casino rule configurations:

Vegas Strip, Vegas Downtown, Atlantic City, Monte Carlo, Macau, European, Sydney, Single Deck, and Double Deck.

You can also fully customize rules including: number of decks (1-8), dealer hits/stands on soft 17, double after split, surrender allowed, blackjack payout ratio, and more.

21 Trainer supports four card counting systems: Hi-Lo, KO, Omega II, and Zen Count.

Hi-Lo is the most widely used: cards 2 through 6 count as +1, 7 through 9 as 0, and 10 through ace as -1. The trainer includes single card and multi-card drills, true count conversion, and index deviation training.

Refunds start with the store you bought from. To request a refund:

App Store purchases
1. Go to reportaproblem.apple.com.
2. Sign in with your Apple ID.
3. Find the purchase and select "Request a refund."

Google Play purchases
1. Go to play.google.com/store/account/orderhistory.
2. Find the order and select "Report a problem."
3. Choose the option that fits and say in the form that you would like a refund.

If Google Play does not grant the refund, contact us and we will help.