# Full Deck Solitaire vs 21 Black

The clearest difference is in-app purchases: 21 Black at none against Full Deck Solitaire's 7. 21 Black also leads on ads (none vs shown) and review sentiment (100% vs 68%). Full Deck Solitaire's advantage is update cadence (every 9 days vs every 15 months) and ratings volume (23K vs 5). On price, rating and device support there is nothing between them.

Both are free to download. Full Deck Solitaire sells 7 one-off in-app purchases. 21 Black asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Full Deck Solitaire against 4.8 for 21 Black. That said, the two scores are not equally well evidenced: Full Deck Solitaire has 23K ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 68% of Full Deck Solitaire's written reviews are positive against 100% of 21 Black's.

Full Deck Solitaire ships an update every 9 days, 21 Black every 15 months. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Full Deck Solitaire | 21 Black |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (23K ratings)](https://appshunter.io/ios/app/full-deck-solitaire/id413443169/reviews) | **[4.8 (5 ratings)](https://appshunter.io/ios/app/21-black/id1044373988/reviews)** |
| Number of ratings | **23K** | 5 |
| Positive reviews | 68.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 15 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 150 MB | 48 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [GRL Games](https://appshunter.io/developer/399292389) | [Bit Free Games](https://appshunter.io/developer/1044373461) |

## What reviewers say

### Full Deck Solitaire

[App page](https://appshunter.io/ios/app/full-deck-solitaire/id413443169)

Experience a vast collection of solitaire card games with a beautiful interface and smart features. Track your progress with detailed statistics and enjoy daily challenges for endless fun. Customize your background with stunning visuals.

**Highlights:** 83 unique solitaire variations, Smart hint system, Detailed game statistics, Daily challenges, Customizable backgrounds, Smart badge system

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Background Pack | $0.99 | one-time |
| $5,000 poker chips | $0.99 | one-time |
| Add $3,000 to AI Players | $0.99 | one-time |
| 100 Extra Spins | $0.99 | one-time |
| $10,000 in poker chips | $1.99 | one-time |
| $20,000 poker chips | $2.99 | one-time |
| Remove ALL Ads | $4.99 | one-time |

**What reviewers like**

- 🎮 Great games
- 👍 Enjoyment
- 🎨 Proper game
- 🎨 Pretty good overall
- 👍 Fantastic solitaire app

**What reviewers complain about**

- 🙄 Large ads
- 🙄 Spend more time watching ads than playing
- 🙄 Long boring ads
- 🙄 Ads are getting worse
- 🙄 Constantly crashes

**Reported bugs**

- Sound not working
- Orientation issues
- Games not functioning properly
- Stats/progress not saving
- Freezing/crashing issues

**Requested features**

- Sound option
- Ability to replay games
- Winnable game option
- Daily challenges
- Scoring system improvements


### 21 Black

[App page](https://appshunter.io/ios/app/21-black/id1044373988)

A brain training puzzle game where you merge cards horizontally or vertically to reach a sum of 21. Features endless and puzzle modes with unlimited hints and no time limits.

**Highlights:** Card merging gameplay, Endless mode, Puzzle mode with custom sizes, Share and scan puzzles, Unlimited free hints, No time limits

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

**In-app purchases:** none


## Frequently asked questions

### Is Full Deck Solitaire free?

Full Deck Solitaire is free to download, with in-app purchases available.

### Is 21 Black free?

21 Black is free to download, with no in-app purchases.

### Which has better reviews, Full Deck Solitaire or 21 Black?

21 Black is rated higher. Full Deck Solitaire averages 4.7 out of 5 from 23K ratings, while 21 Black averages 4.8 from 5 ratings.

### Do Full Deck Solitaire or 21 Black have ads?

Full Deck Solitaire shows ads; 21 Black does not.

### Which is updated more often, Full Deck Solitaire or 21 Black?

Full Deck Solitaire ships an update every 9 days, and 21 Black every 15 months. Most recently, Full Deck Solitaire was updated on October 18, 2026 and 21 Black on October 15, 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.*