# Blackjack Strategy Training vs Card Adder 21

The clearest difference is price: Card Adder 21 at Free against Blackjack Strategy Training's $0.99. Card Adder 21 also leads on rating (5.0 vs 4.6) and update cadence (every 5 days vs monthly). Blackjack Strategy Training's advantage is in-app purchases (none vs 1) and ratings volume (147 vs 1). On ads, monetization model, device support and iOS requirement there is nothing between them.

Card Adder 21 is free to download; Blackjack Strategy Training costs $0.99 up front. Card Adder 21 sells 1 one-off in-app purchase. Blackjack Strategy Training asks for nothing beyond the download.

Card Adder 21 holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Blackjack Strategy Training has 147 ratings behind it against 1, so its average is the more settled of the two.

Blackjack Strategy Training ships an update monthly, Card Adder 21 every 5 days. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Blackjack Strategy Training | Card Adder 21 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.6 (147 ratings)](https://appshunter.io/ios/app/blackjack-strategy-training/id6472889123/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/card-adder-21/id6748666396/reviews)** |
| Number of ratings | **147** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free | Free |
| Best chart rank | **#98** | — |
| Size | 20 MB | 79 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [NT2 Gaming, LLC](https://appshunter.io/developer/1652059857) | [Dot Business Integrated Solutions](https://appshunter.io/developer/1808206089) |

## What reviewers say

### Blackjack Strategy Training

[App page](https://appshunter.io/ios/app/blackjack-strategy-training/id6472889123)

**Currently charting:** #98 Top Paid · Casino (US App Store)

Learn and master blackjack strategy with this interactive coach. Practice every hand using real rules, customizable settings, and intelligent hints to understand optimal moves. Features include card counting practice, progress tracking, and offline play.

**Highlights:** Learn optimal strategy for every hand, Practice with real blackjack rules, Customizable settings and intelligent hints, Card counting practice, Track progress and bankroll, Offline play

**In-app purchases:** none


### Card Adder 21

[App page](https://appshunter.io/ios/app/card-adder-21/id6748666396)

Enhance your mental math skills by tracking a running total as cards are dealt. Progress through increasingly challenging levels with a timed element. The game offers progress tracking and is designed to make counting enjoyable.

**Highlights:** Progressive difficulty levels, Timed challenges, Running total tracking, Progress tracking, Card dealing gameplay

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Card Adder 21 Pro Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is Blackjack Strategy Training free?

Blackjack Strategy Training costs $0.99, with no in-app purchases.

### Is Card Adder 21 free?

Card Adder 21 is free to download, with in-app purchases available.

### Which has better reviews, Blackjack Strategy Training or Card Adder 21?

Card Adder 21 is rated higher. Blackjack Strategy Training averages 4.6 out of 5 from 147 ratings, while Card Adder 21 averages 5.0 from 1 ratings.

### Do Blackjack Strategy Training or Card Adder 21 have ads?

Neither Blackjack Strategy Training nor Card Adder 21 shows ads.

### Which is updated more often, Blackjack Strategy Training or Card Adder 21?

Blackjack Strategy Training ships an update monthly, and Card Adder 21 every 5 days. Most recently, Blackjack Strategy Training was updated on November 8, 2026 and Card Adder 21 on November 5, 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.*