# Blackjack with Odds vs Card Adder 21

The clearest difference is monetization model: Card Adder 21 at free against Blackjack with Odds's free with in-app purchases. Card Adder 21 also leads on update cadence (every 5 days vs every 3 weeks) and rating (5.0 vs 4.8). Blackjack with Odds's advantage is ratings volume (40 vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Blackjack with Odds sells 5 in-app purchases, starting at $1.99 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 4.8. That said, the two scores are not equally well evidenced: Blackjack with Odds has 40 ratings behind it against 1, so its average is the more settled of the two.

Blackjack with Odds ships an update every 3 weeks, Card Adder 21 every 5 days. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Blackjack with Odds | Card Adder 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (40 ratings)](https://appshunter.io/ios/app/blackjack-with-odds/id6470506973/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/card-adder-21/id6748666396/reviews)** |
| Number of ratings | **40** | 1 |
| Positive reviews | 71.4% 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 | 161 MB | 79 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [App Jar LLC](https://appshunter.io/developer/1008443890) | [Dot Business Integrated Solutions](https://appshunter.io/developer/1808206089) |

## What reviewers say

### Blackjack with Odds

[App page](https://appshunter.io/ios/app/blackjack-with-odds/id6470506973)

Experience a realistic casino blackjack game with interactive strategy guidance. Learn card counting and practice specific scenarios with training modes. See the exact odds of every play to improve your game.

**Highlights:** Realistic casino simulation, Real-time odds display, Interactive strategy card, Training modes for pairs and soft aces, Card counting practice, Configurable table rules

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| V.I.P. Weekly Subscription | $1.99 | per 7 days |
| V.I.P. Access (1 week) | $1.99 | one-time |
| V.I.P. Access (1 month) | $2.99 | one-time |
| Lifetime V.I.P. Membership | $9.99 | one-time |
| Lifetime VIP Unlimited Access | $9.99 | 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 with Odds free?

Blackjack with Odds 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 with Odds or Card Adder 21?

Card Adder 21 is rated higher. Blackjack with Odds averages 4.8 out of 5 from 40 ratings, while Card Adder 21 averages 5.0 from 1 ratings.

### Do Blackjack with Odds or Card Adder 21 have ads?

Neither Blackjack with Odds nor Card Adder 21 shows ads.

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

Blackjack with Odds ships an update every 3 weeks, and Card Adder 21 every 5 days. Most recently, Blackjack with Odds was updated on October 24, 2026 and Card Adder 21 on October 9, 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.*