# Learn Blackjack vs Card Adder 21

The clearest difference is rating: Card Adder 21 at 5.0 against Learn Blackjack's 4.0. Card Adder 21 also leads on update cadence (every 5 days vs every 6 weeks) and monetization model (free vs free with in-app purchases). Learn Blackjack's advantage is ratings volume (4 vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Learn Blackjack sells 3 in-app purchases, starting at $5.99 per 7 days and Card Adder 21 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Card Adder 21 holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Learn Blackjack ships an update every 6 weeks, Card Adder 21 every 5 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Learn Blackjack | Card Adder 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/learn-blackjack-21-trainer/id6747049929/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/card-adder-21/id6748666396/reviews)** |
| Number of ratings | **4** | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 18 MB | 79 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [SUPERMODE](https://appshunter.io/developer/1819567663) | [Dot Business Integrated Solutions](https://appshunter.io/developer/1808206089) |

## What reviewers say

### Learn Blackjack

[App page](https://appshunter.io/ios/app/learn-blackjack-21-trainer/id6747049929)

Master blackjack with interactive training, personalized feedback, and real-time strategy guidance. Practice specific scenarios, track your progress, and understand the house edge to play with professional confidence.

**Highlights:** Interactive training game, Specialized training scenarios, Real-time casino edge calculator, Intelligent progress tracking, Comprehensive performance analytics, Dynamic strategy cards, Customizable game rules

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $5.99 | per 7 days |
| Yearly Subscription | $17.99 | per year |
| Lifetime PRO | $19.99 | one-time |


### 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 Learn Blackjack free?

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

### Is Card Adder 21 free?

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

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

Card Adder 21 is rated higher. Learn Blackjack averages 4.0 out of 5 from 4 ratings, while Card Adder 21 averages 5.0 from 1 ratings.

### Do Learn Blackjack or Card Adder 21 have ads?

Neither Learn Blackjack nor Card Adder 21 shows ads.

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

Learn Blackjack ships an update every 6 weeks, and Card Adder 21 every 5 days. Most recently, Learn Blackjack was updated on November 5, 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.*