Full Deck Solitaire vs 21 Black
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Full Deck Solitaire
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.
- 83 unique solitaire variations
- Smart hint system
- Detailed game statistics
- Daily challenges
- Customizable backgrounds
- Smart badge system
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Designed by a Solitaire loving Mom and Daughter, Full Deck Solitaire is a beautiful card game with an easy to use user interface. Eight four uniquely different variations of Solitaire not seen in many other games keep even the most seasoned guru occupied. Statistics for each game let you know how many hours you have played, games you have won and your highest score for that game. A uniquely smart three level hint system lets you know if there are moves to play and will even shake the cards if you can’t quite see that elusive move. Smart badges on decks show you how many cards are left to be dealt from that deck. This latest update adds Daily Challenges, three guaranteed solvable games of solitaire for you to bend your mind over. Can you get all nine stars every day? "Clearly the best solitaire game available." "Most excellent solitaire game ever!" "Excellent graphics. Realistic cards." "Love this app." "Excellent graphics and a huge selection of games makes the app feel fresh every time I play." "I love this app and all the games" "Wonderful game, great time waster!" "One of the best editions I've ever played! Excellent!" "This is a wonderful app." - Just some of the reviews for the current version! Thank you, we are really humbled by your love for the game! The game has an option of a classic background, your own wallpaper, or a gorgeous moving video of the ocean under the Moon. Games include Klondike 3 Card, Klondike 1 Card, Vegas Solitaire, Freecell, Thieves Of Egypt, Forty Thieves, Red And Black, Royal Parade, Demon, Canfield, Canfield 1 Card Turn, Double Canfield, Spider 1 Suit, Spider 2 Suit, Spider 3 Suit, Spider 4 Suit, Pyramid, Tri Peaks Solitaire, Golf, Golf Around Corner, Gaps, Montana, Beleaguered Castle, Bisley, Mrs. Mop, Clock Patience, Grandfather's Clock, German Clock, Captive Queens, Scorpion, Scorpion 2, Wasp, Three Blind Mice, Osmosis, Yukon, Russian Solitaire, Chinese Solitaire, Australian Patience, Fortress, Pyramid Golf, Aces Up, Miss Milligan, Demons and Thieves, La Belle Lucie, Trefoil, The Fan, Super Flower Garden, Storehouse, Cruel Solitaire, Baker's Dozen, Spanish Patience, Castles in Spain, Portuguese Solitaire, Good Measure, Baker's Game, Eight Off, Penguin Solitaire, Seahaven Towers, Rank And File, Number Ten, Lady Jane, Zerline, Double Klondike, Double Klondike 1 Card, Osmosis By The Book, Eagle Wing, Texas Fury and Texas Patience. A few of these classic games are unique to Full Deck Solitaire! And now with daily challenges, unique solvable puzzles that will challenge you every day. Please write or visit our support page if you are having any problems at all. We want you to love this game!
21 Black
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.
- Card merging gameplay
- Endless mode
- Puzzle mode with custom sizes
- Share and scan puzzles
- Unlimited free hints
- No time limits
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21 Black is a challenging puzzle game that mixes solitaire and blackjack. Your goal is simple: merge the cards to make 21. How far will you get? 21 Black Features SIMPLE GAMEPLAY Swipe to merge the cards horizontally or vertically, different numbers add up while identical numbers stay the same. Get to 21 and win! ENDLESS MODE Relax in endless mode and see how many 21's can you make PUZZLE MODE Choose from multiple puzzle sizes and collapse the entire board into a single 21. Perfect for training your brain to recognize patterns and build new strategies. SHARE + DISCOVER Played a cool puzzle? Share it with your friends and the world! Or scan puzzles other's have discovered with the built in puzzle camera scanner! NO STRESS Unlimited free hints and no time limits means you can relax and get into a flow 100% FREE That's right, everything is unlocked and there is nothing to purchase Fun and addicting gameplay that's guaranteed to test and train your brain in new ways! Questions? Please contact us at contact@bitfreegames.com
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Full Deck Solitaire | 21 Black |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (23K ratings) | 4.8 (5 ratings) — better |
| Positive reviews | 68.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 23K — better | 5 |
| Update frequency | Every 9 days — better | Every 15 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 150 MB | 48 MB |
| Age rating | 12+ | 4+ |
| Developer | GRL Games | Bit Free Games |
Customer experience
Full Deck Solitaire
21 Black
Bugs and requests
Full Deck Solitaire
Reported bugs
5 issues- Sound not working
- Orientation issues
- Games not functioning properly
- Stats/progress not saving
- Freezing/crashing issues
Requested features
5 requests- Sound option
- Ability to replay games
- Winnable game option
- Daily challenges
- Scoring system improvements
21 Black
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Full Deck Solitaire
- Background Pack$0.99
- $5,000 poker chips$0.99
- Add $3,000 to AI Players$0.99
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- 100 Extra Spins$0.99
- $10,000 in poker chips$1.99
- $20,000 poker chips$2.99
- Remove ALL Ads$4.99
21 Black
No in-app purchases
Questions
Is Full Deck Solitaire free?
Is 21 Black free?
Which has better reviews, Full Deck Solitaire or 21 Black?
Do Full Deck Solitaire or 21 Black have ads?
Which is updated more often, Full Deck Solitaire or 21 Black?
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