# Blackjack Hero 21 Trainer — user reviews > 9 indexed App Store user reviews of Blackjack Hero 21 Trainer by Matthew Dietrich, rated 4.80/5 from 5 ratings. - Source: https://appshunter.io/ios/app/blackjack-hero-21-trainer/id6550897672/reviews - App overview in markdown: https://appshunter.io/ios/app/blackjack-hero-21-trainer/id6550897672.md - Rating breakdown: 5★ 4 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 0 ## Most critical reviews (9 lowest-rated) ### 4/5 — Great training tool *2025-05-19* The tutorial part is extremely helpful in learning the rules and for helping make the correct play. The 18 game limit stinks, being forced to watch ridiculous ads in order to play is senseless **Developer response:** Thanks, Mike - I’m really glad to hear the app’s been helpful for you. I’ve put over 80 hours into building this game, and for now, the ads are the best way to help cover that time and effort. That said, I’m adding a premium version in the next update that lets you pay once for unlimited games and an ad-free experience. I really appreciate your support and hope the app continues to be useful for you! ### 4/5 — Very helpful tutorial *2025-01-01* This is a very helpful tutorial with great advice. I have run across a few hands that did not show the cards. Could have been Avery slow display update. **Developer response:** Thanks for enjoying the app! Just put out a new update today which should have better performance for that. ### 5/5 — upgrade problem? *2025-07-14* I was trying to upgrade the app, but keep getting a “purchase failed” notification…I checked my payment option, still active with no problems. Is the upgrade no longer available? I’m really enjoying this app, it has been very helpful to me, very well done and easy to navigate **Developer response:** Happy to share that the in app purchase is officially available. Thanks so much for your continued support!!! ### 5/5 — Great training tool *2025-06-14* The tutorial part is extremely helpful in learning the rules and for helping make the correct play. * I have edited my review after receiving a very detailed and polite reply from the creator of the app. I am looking forward to the upgrade version, I can only imagine how much that will help my game play. Thank you! **Developer response:** Thanks, Mike - I’m really glad to hear the app’s been helpful for you. I’ve put over 80 hours into building this game, and for now, the ads are the best way to help cover that time and effort. That said, I’m adding a premium version in the next update that lets you pay once for unlimited games and an ad-free experience. I really appreciate your support and hope the app continues to be useful for you! ### 5/5 — Great for learning the finer points *2024-10-20, version 1.06* Even with some very successful trips to vegas I’m still looking to get more out of the game. This app has pointed out some errors in my strategy. If you’re looking to learn how to play blackjack, or if you want to get better at it, this app will not disappoint. ### 5/5 — Simple, free game to train optimal blackjack *2024-10-09* This is exactly what I was looking for. A simple, free game to train optimal blackjack play. Detailed hand notes after each hand show why a play was suboptimal. Great app. ### 5/5 — Awesome! *2024-08-19, version 1.06* Great design to learn and practice Blackjack!!! ### 5/5 — Love this app *2024-08-16* It helps you to play better and show you the result of it **Developer response:** Thrilled to hear this feedback! I'm so glad that it's helped you play better! ### 5/5 — best black jack app! *2024-07-20, version 1.0.1* This app changed my life!! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*