Terms of Service

Last updated: November 9, 2026

1. Acceptance of Terms

By downloading, installing, or using 21 Trainer ("the App"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, do not use the App.

2. Not Real Gambling

3. Description of Service

21 Trainer is a mobile application for iOS and Android that provides:

• Basic Strategy Training: Practice making optimal blackjack decisions with real-time feedback and explanations.
• Card Counting Training: Learn and practice the Hi-Lo card counting system with drills and deviation training (Pro feature).
• Bankroll Simulation: Simulate casino sessions using virtual chips to practice strategy adherence in a realistic setting (Pro feature).
• Statistics and Analytics: Track your training progress, accuracy by hand type, and identify areas for improvement.

All features are designed for education and entertainment. The App is intended for an adult audience.

4. In-App Purchases

21 Trainer offers optional in-app purchases ("Pro" features) that are processed only by the store you install the App from: Apple's App Store on iPhone and iPad, or Google Play on Android. By making a purchase, you agree to the following:

• All billing is handled by Apple or Google, depending on the store you purchase from. We do not process payments directly.
• Subscriptions automatically renew unless canceled before the end of the current billing period (on the App Store, at least 24 hours before).
• You can manage and cancel subscriptions in your Apple ID account settings, or in the Google Play app under Payments & subscriptions.
• Lifetime purchases are a one-time payment granting permanent access to Pro features on the platform where you bought them.
• Purchases do not transfer between the App Store and Google Play.
• Refund requests for App Store purchases must be directed to Apple. For Google Play purchases, request a refund through Google Play first. If Google does not grant it, contact us through the support page.
• If you ask Apple for a refund of an App Store purchase, Apple may ask us about that purchase. By making a purchase, you consent to us telling Apple that the purchase was delivered and works, whether a free trial or the free version of the App was available before you bought, and that we ask Apple to decline the refund. We do not send your name or details of how you used the App. You can withdraw this consent at any time on our refund consent page.

In-app purchases do not increase odds of winning in any simulation. All simulations use the same mathematically fair dealing system regardless of purchase status.

5. Virtual Currency

The App's Bankroll Simulator feature uses virtual chips for educational simulation purposes. These virtual chips:

• Have no real-world monetary value
• Cannot be purchased with real money
• Cannot be redeemed, exchanged, transferred, or converted to real money
• Cannot be traded between users
• Exist solely for the purpose of simulating realistic bankroll management practice

6. User Conduct

You agree to use the App for personal, non-commercial, educational purposes only. You may not:

• Reverse-engineer, decompile, or disassemble the App
• Copy, modify, or create derivative works of the App
• Use the App for any unlawful purpose
• Attempt to circumvent any security features or access restrictions

7. Intellectual Property

All content, design, graphics, code, and other intellectual property within 21 Trainer are owned by 21Trainer and are protected by applicable copyright and intellectual property laws. You are granted a limited, non-exclusive, non-transferable license to use the App for personal purposes in accordance with these Terms.

8. Limitation of Liability

To the maximum extent permitted by applicable law:

• The App is provided "as is" without warranties of any kind, express or implied.
• We do not guarantee any specific outcomes from using the App, including but not limited to success at real casino tables or in any gambling activity.
• We are not responsible for any financial losses incurred through real-money gambling, regardless of whether the user has trained using this App.
• Our total liability to you for any claim arising from or related to the App shall not exceed the amount you paid for the App in the twelve months preceding the claim.

Gambling involves risk. If you choose to gamble with real money at a casino or through any other means, you do so entirely at your own risk. 21 Trainer is not responsible for any decisions you make regarding real-money gambling.

9. Age Requirement

The App is intended for adult users. By using this App, you represent that you are at least 17 years of age or have reached the age of majority in your jurisdiction, whichever is greater. The App contains simulated gambling content for educational purposes. No real money is involved.

10. Termination

You may stop using the App at any time by uninstalling it from your device. We reserve the right to modify, suspend, or discontinue the App at any time without prior notice. These Terms will survive any termination of your use of the App.

11. Changes to These Terms

We may update these Terms from time to time. Changes will be posted on this page with an updated "Last updated" date. Continued use of the App after changes constitutes acceptance of the revised Terms.

12. Contact Us

If you have questions about these Terms of Service, please contact us:

You can reach us through our support page.