# TwentyOne vs Blackjack Basic Trainer

The clearest difference is in-app purchases: Blackjack Basic Trainer at none against TwentyOne's 1. TwentyOne's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. TwentyOne sells 1 one-off in-app purchase. Blackjack Basic Trainer asks for nothing beyond the download.

TwentyOne ships an update every 9 days, Blackjack Basic Trainer weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | TwentyOne | Blackjack Basic Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/twentyone-blackjack-trainer/id6781118717/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Freemium | — |
| Size | 2 MB | 45 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Justin Taddeo](https://appshunter.io/developer/1885201658) | [Brian Gregor](https://appshunter.io/developer/6789351486) |

## What reviewers say

### TwentyOne

[App page](https://appshunter.io/ios/app/twentyone-blackjack-trainer/id6781118717)

Master blackjack with a minimalist trainer that teaches mathematically correct plays for every hand. Practice with customizable rules and track your progress. Unlock advanced features like expected value and card counting with a one-time purchase.

**Highlights:** Basic strategy chart for all hands, Customizable table rules, Practice modes for hands and pairs, Performance tracking, Expected value calculations, Card counting trainer (Hi-Lo system)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TwentyOne Pro | $4.99 | one-time |


### Blackjack Basic Trainer

[App page](https://appshunter.io/ios/app/blackjack-basic-trainer/id6789351484)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TwentyOne free?

TwentyOne is free to download, with in-app purchases available.

### Is Blackjack Basic Trainer free?

Blackjack Basic Trainer is free to download, with no in-app purchases.

### Do TwentyOne or Blackjack Basic Trainer have ads?

Blackjack Basic Trainer shows ads; TwentyOne does not.

### Which is updated more often, TwentyOne or Blackjack Basic Trainer?

TwentyOne ships an update every 9 days, and Blackjack Basic Trainer weekly. Most recently, TwentyOne was updated on October 24, 2026 and Blackjack Basic Trainer on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*