# Blackjack Advisor vs Card Adder 21

The clearest difference is monetization model: Card Adder 21 at free against Blackjack Advisor's free with in-app purchases. Card Adder 21 also leads on update cadence (every 5 days vs every 3 weeks) and device support (3 vs 1). Blackjack Advisor's advantage is ratings volume (5 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Blackjack Advisor sells 2 one-off in-app purchases and Card Adder 21 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Blackjack Advisor against 5.0 for Card Adder 21. That said, the two scores are not equally well evidenced: Blackjack Advisor has 5 ratings behind it against 1, so its average is the more settled of the two.

Blackjack Advisor ships an update every 3 weeks, Card Adder 21 every 5 days. The most recent releases landed on September 15, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Blackjack Advisor | Card Adder 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/blackjack-advisor/id6447469106/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/card-adder-21/id6748666396/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1 MB | 79 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Research and Market Insights B.V.](https://appshunter.io/developer/1589596879) | [Dot Business Integrated Solutions](https://appshunter.io/developer/1808206089) |

## What reviewers say

### Blackjack Advisor

[App page](https://appshunter.io/ios/app/blackjack-advisor/id6447469106)

This application offers real-time guidance for Blackjack players, suggesting optimal moves like standing, hitting, splitting, or doubling based on dealer and player cards. It aims to improve your odds at the table with no advertisements or subscriptions required.

**Highlights:** Real-time strategy suggestions, Stand, hit, split, double guidance, Dealer and player card input, Improves odds at Blackjack, No ads, No subscription

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One-time Generous Tip | $3.99 | one-time |
| One-time Amazing Tip | $6.99 | 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 Blackjack Advisor free?

Blackjack Advisor 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, Blackjack Advisor or Card Adder 21?

Blackjack Advisor and Card Adder 21 are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.

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

Neither Blackjack Advisor nor Card Adder 21 shows ads.

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

Blackjack Advisor ships an update every 3 weeks, and Card Adder 21 every 5 days. Most recently, Blackjack Advisor was updated on September 15, 2026 and Card Adder 21 on September 7, 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.*