TwentyOne

Terms of use

Last updated June 14, 2026

By downloading, installing, or using Blackjack Trainer (“the App”), you agree to be bound by these Terms of Use.

Educational use only

Blackjack Trainer is an educational tool designed to help you learn and practice blackjack basic strategy. It does not involve real money or real wagering of any kind. Scores are for practice tracking only and have no monetary value.

No guarantee of results

While the App teaches mathematically optimal blackjack strategy, using the App does not guarantee any outcome at a real blackjack table. Blackjack involves inherent risk and variance. We make no representations or warranties regarding your performance in any real-world setting.

In-app purchases

The App offers optional premium subscriptions and a one-time lifetime purchase. All payments are processed by the Apple App Store or Google Play Store. Monthly and annual subscriptions automatically renew unless cancelled at least 24 hours before the end of the current billing period.

Age requirement

You must be at least 13 years old to use the App. If you are under 18, you should have a parent or guardian review these Terms.

Contact

Questions: hello@learnblackjack.org