# TwentyOne vs Blackjack | 21

The clearest difference is ads: TwentyOne at none against Blackjack | 21's shown. TwentyOne also leads on review sentiment (100% vs 67%) and rating (5.0 vs 4.6). Blackjack | 21's advantage is ratings volume (60 vs 3) and update cadence (every 3 days vs every 9 days). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. TwentyOne sells 1 one-off in-app purchase and Blackjack | 21 sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

TwentyOne holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Blackjack | 21 has 60 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of TwentyOne's written reviews are positive against 67% of Blackjack | 21's.

TwentyOne ships an update every 9 days, Blackjack | 21 every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TwentyOne | Blackjack | 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/twentyone-blackjack-trainer/id6781118717/reviews)** | [4.6 (60 ratings)](https://appshunter.io/ios/app/blackjack-21/id6790571321/reviews) |
| Number of ratings | 3 | **60** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 2 MB | 19 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Justin Taddeo](https://appshunter.io/developer/1885201658) | [High Roller Studios](https://appshunter.io/developer/6790571323) |

## 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 | 21

[App page](https://appshunter.io/ios/app/blackjack-21/id6790571321)

Practice blackjack with a personalized coach and interactive lessons. Improve your strategy through skill-based progression, tournaments, and detailed stats without risking real money.

**Highlights:** Personalized blackjack coach, Interactive lessons for strategy, Skill-based progression system, Weekly seeded tournaments, Detailed lifetime statistics, Customizable table rules, Haptic and sound feedback

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small chip pack | $0.99 | one-time |
| Medium chip pack | $2.99 | one-time |
| Large chip pack | $4.99 | one-time |
| Mega chip pack | $9.99 | one-time |


## Frequently asked questions

### Is TwentyOne free?

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

### Is Blackjack | 21 free?

Blackjack | 21 is free to download, with in-app purchases available.

### Which has better reviews, TwentyOne or Blackjack | 21?

TwentyOne is rated higher. TwentyOne averages 5.0 out of 5 from 3 ratings, while Blackjack | 21 averages 4.6 from 60 ratings.

### Do TwentyOne or Blackjack | 21 have ads?

Blackjack | 21 shows ads; TwentyOne does not.

### Which is updated more often, TwentyOne or Blackjack | 21?

TwentyOne ships an update every 9 days, and Blackjack | 21 every 3 days. Most recently, TwentyOne was updated on October 24, 2026 and Blackjack | 21 on October 25, 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.*