# Blackjack 21: Strategy Trainer — user reviews > 219 indexed App Store user reviews of Blackjack 21 by BlackJack Trainer 21 Training AG, rated 4.70/5 from 5,601 ratings. - Source: https://appshunter.io/ios/app/blackjack-21-strategy-trainer/id597239290/reviews - App overview in markdown: https://appshunter.io/ios/app/blackjack-21-strategy-trainer/id597239290.md - Rating breakdown: 5★ 4,469 · 4★ 725 · 3★ 194 · 2★ 51 · 1★ 162 ## What do users think of Blackjack 21? Overall sentiment: neutral **Pros** - 🚀 Great training - 👍 Helpful for practicing basic strategy - 👍 Solid interface - 👍 Detailed feedback - 👍 Easy to use UI - 👍 Excellent for learning basic strategy **Cons** - 🐛 Buggy with pop-ups and crashes - 🔒 Subscription model for full functionality - 🔒 Paywall for advanced features - 👎 Lacks explanation for correct/incorrect moves - 👎 Inaccurate basic strategy recommendations - 👎 Limited free version **Commonly reported bugs** - Incorrect basic strategy recommendations - Freezing and crashing issues - Incompatibility with certain devices - Subscription issues and unexpected charges **Most requested features** - Allow continuing hands beyond initial deal - Provide explanations for correct/incorrect moves - Incorporate card counting and strategy deviations - Customize settings to match casino rules - Reset weakest hands chart - Add betting options and player profiles ## Newest reviews (15 of 219) ### 3/5 — Okay *2026-08-17, version 3.1.5* Es una buena app pero necesita más herramientas de entretenimiento para el precio que cuesta! La app es muy básica, debería ofrecer como enseñar a contar también ### 4/5 — Great App *2026-08-12, version 3.1.4* Great app only 4 stars because I think it would be even better if in the core practice mode you click on a card to switch it. I can stare at the tables all day long but I wish I could see in real time when something could switch from Hit, Stand, Double, Split depending on if the dealer would’ve had this card rather than the other or vice versa. ### 4/5 — Muscle Memory Black Jack *2026-07-31, version 3.1.4* Pretty practical, the sub is not too overwhelming.. most folks spend a lot more on trainers. I enjoy the feature for weak hands practice. This doesn’t turn you into a complete player.. but the practice is simple and clear to get familiar with basic strategy. ### 4/5 — Great for learning *2026-06-28, version 3.1.4* Definitely great for teaching you how to play the game, and how to master it. But could be more detailed on what to do when having a certain hand. ### 5/5 — Good app *2026-04-26, version 3.1.2* Could use more features but is very strong at what it does. ### 5/5 — Practice with BJT *2026-04-20, version 3.1.2* Haven’t played BJ in a while. BJT is an excellent way of refreshing my skills ### 5/5 — Black jack Trainer Review *2026-04-07, version 3.1.0* Outstanding thought I knew so much about black jack until l mucked around with the free trial definitely purchasing the extension after the week trial until lve mastered every move l mucked up ### 5/5 — Great! *2026-04-02, version 3.1.0* I love this app as a teaching tool to for a foundation as a novice player. ### 5/5 — Really cool *2026-03-28, version 3.0.8* Love it ### 5/5 — Playing with purpose *2026-03-20, version 3.0.8* I like that it is speeding up my playing. I was always self conscious about other people judging my choices and berating me as an amateur ### 4/5 — Great trainer *2026-03-19, version 3.0.8* Add the 8 decks with shuffle and outcomes ### 5/5 — Great App! *2026-02-16, version 3.0.8* This is a great app to work on memorizing basic strategy. The year subscription isn’t awfully expensive and you can customize the basic strategy for the type of game you plan on playing. It’s simple. Shows you all of your stats and what your weakest hands are and gives you an explanation for every hand whether you get it right or wrong. I’m just beginning to learn basic strategy and this training app has helped me tremendously! Highly recommended! ### 5/5 — Buy the year pass you cheapskates *2026-02-14, version 3.0.6* Costs less than two hands in Vegas and it's great to use. Don't be bad at math and play blackjack without training. ### 5/5 — Super App *2026-02-13* Ursprüngliche Bugs wurden behoben, jetzt funktioniert alles wie gewünscht! ### 5/5 — Great practice *2026-02-10, version 3.0.6* Love it ## Most critical reviews (10 lowest-rated) ### 1/5 — Warning! *2026-08-11, version 3.1.4* Don’t sign up for the free trail. Even if you cancel they will bill you anyways and Apple leaves you with no recourse. Edit: Apple denied my refund request without explanation. BJT is shady. Use someone else. ### 1/5 — Beware of sneaky free trial! *2026-07-25, version 3.1.4* I signed up for a free trial and got charged when I cancelled. Beware! ### 1/5 — Ripped Me Off *2026-04-19, version 3.1.2* I did a seven day trial, put a reminder in my calendar to cancel and they STILL billed my card for a one year subscription. Totally outrageous and borderline criminal. I have reached out to them, we will see if they do the right thing or not. ### 1/5 — False advertising *2026-04-01, version 3.1.0* They advertised a “free trial” for 7 days. After clicking it, it charged me $20, then told me it will take another $23 the day it was supposed to charge me initially. absolute scam. ### 1/5 — Use to be a Great App *2026-03-19, version 3.0.8* This used to be a great app. I've used this app for several years. Over that time I've played close to 100,000 games with a 99% correct move rate. They changed this app, they made it much slower and changed the strategy table so now some of the moves they tell you are just plain wrong. As you can tell by the number of games I played I really loved this app but unfortunately I will not be renewing my subscription. ### 1/5 — Paid App Minimal features *2026-01-07, version 3.0.1* App is disguised as free but very limited. ### 1/5 — Update *2025-12-21, version 3.0.0* The new update isn’t as good as the original. The charts are wrong ie. It says to stand on pair of 9’s against anything. I really enjoyed the old app and have played over 10,000 hands but this new version is just not as good. ### 1/5 — I wouldn’t recommend *2025-12-14, version 2.7.7* It feels like a guessing game and all the features are blocked behind a pay wall, if the app was gunna be unusable without payment should of just made the app cost money ### 1/5 — Shills *2025-12-14, version 2.7.7* Used to have a ton. Now everything paywalled. Shilled out ### 1/5 — Buggy *2025-11-20, version 2.7.5* “Become a Player” screen still pops up incessantly despite signing up for a subscription already (I even restarted the app) ## Most praised reviews (10 highest-rated) ### 5/5 — Honestly helpful *2026-08-26, version 3.1.5* I’m a real person I just downloaded this today I like it I’m learning a lot ### 5/5 — Get it! *2026-08-24, version 3.1.5* Yep it’s for real! ### 5/5 — Great. *2026-08-23, version 3.1.5* Very helpful for a beginner ### 5/5 — Good, but vibrations are anoying *2026-08-23, version 3.1.5* I like the app so far, but the vibrations are anoying af and I cant seem to be able to turn them off. Would love the option to do so. ### 5/5 — Great trainer for basic strategy. *2026-07-11, version 3.1.4* I was using the black Jack apprentice program for many years and really enjoy the buttons instead of jesters for sure. The charts are very clean and the simulations really focus on hands that have unique strategies like 12 and tens for example. I am so pleased and it’s not glitchy ### 5/5 — Nice *2026-06-28, version 3.1.4* Great for beginners. Don’t know if I’ll pay for it though. Just gonna try it out for the 7 free days and cancel after that ### 5/5 — Solid *2026-06-23, version 3.1.4* This app has been helping me memorize basic strategy and learn what the actual percentage chances you have with each hand against the dealer. ### 5/5 — Great Practice Tool *2026-06-07, version 3.1.4* Great app for getting quick practice in. Any time I have a few minutes of down time I can open this app and get in hundreds of simulated hands that improve my response time and get where decisions are almost mindless. You just know what to do instantly. ### 5/5 — Easy to learn *2026-05-31, version 3.1.3* Great way to learn and freshen up your blackjack game. Especially if you’re going to a casino. ### 5/5 — Great update. *2026-05-23, version 3.1.3* The new updates is nice!👍 --- *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 2026-09-09.*