# Zone 21 - Fast Math Solitaire — Clash Real Money & Cash Prizes > Math solitaire card game with real cash prizes and multiplayer challenges. (iPhone/iPad app by CodeCube Brothers Partnership.) - Source: https://appshunter.io/ios/app/zone-21-fast-math-solitaire/id1484296990 (this page in markdown: same URL + `.md`) - Developer: [CodeCube Brothers Partnership](https://appshunter.io/developer/415118511) - Category: Games, Sports, Board, Card - Price: Free - Rating: 4.83/5 from 23 App Store ratings · 6 written reviews indexed - Age rating: 17+ - Requires: iOS 12.0 · 155 MB - Languages: English, French, German, Italian, Japanese, Portuguese, Russian, Chinese, Spanish - Released: 2019-11-22 - Data updated: 2026-06-09 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/zone-21-fast-math-solitaire/id1484296990/reviews.md ## What is Zone 21? Welcome to Zone 21 - Fast Math Solitaire a brand new card game where you can win real-world rewards and cash prizes (where available)! Try to stay between 0 and 21. It's not easy and tries to keep the target number close to 21 to earn more points! It's a jackpot when you get exactly 21 and earn great bonus points. SOME KEY FEATURES: • Classic mathematical card game with some amazing twists! • Clear the cards from the table and stay between 0 and 21. • Ready for the challenge? Try to hit the target number 21 and get great bonuses. MULTIPLAYER FEATURES: • Play against friends and solitaire around the world! • Calculate cards as quickly as you can! You have 3 minutes to beat your opponent. • Win and show off your scores on the leaderboard! EARN PRIZES: • Challenge people from around the world • Put your skills to the test and compete to win cash prizes! • Cash rewards for top scorers (where allowed)! Challenge people around the world with Skillz, a competition platform complete with leaderboards, trophies, physical or virtual prizes, and an amazing loyalty program that rewards you for playing! If you have any questions or proposals for the game, we hope you contact us at support@ccbrothers.com If you have any questions about the Skillz system or cash tournaments please contact: support@skillz.com ## Key features - Mathematical card game mechanics - Stay between 0 and 21 - Win real cash prizes - Multiplayer challenges - Timed matches - Global leaderboards ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/zone-21-fast-math-solitaire/id1484296990/reviews.md ### 1/5 — SCAM. DO NOT PLAY *2026-01-02* Sure, u win cash. But everybody and their cousins get a piece of the pie. By the time it gets to u, u owe the bank money cause they will take every penny out of your account. ### 5/5 — Better Than A Deck Of Cards *2022-05-14* No Loading Screens, no shuffling, just log in and play - and it is always a good game; a good game has many paths to the finish line, and unpredictable obstacles; this game balances risk and reward so nicely - this is a great game presented by SKILLZ; play for free or for prizes or for cash, whatever your competitive level, it is fun for all; and, there are no advertisements; aloha; ### 4/5 — No cash tournaments *2021-02-28* It’s a great game, but they haven’t added cash tournaments yet. Please add them! ### 5/5 — Okay *2021-01-07* It’s a good game will be better ### 5/5 — WHEN THE CASH GAMES COME¿?The best game of SKILLZ - cannot wait to play cash... *2020-12-18* All games by this company have great action, music, outlook, and they are good to improve your intellect. PLEASE INFORM ME WHEN CASH TOURNAMENTS ARE AVAILABLE!!!!!!!!!! The first time I do play a game without an ability to participate IN CASH TOURNAMENTS! You got me. Extra class! You are the smartest creators on the market. ### 5/5 — Big boy *2020-08-21* Super great games, creators and staff. They always respond in a matter of minutes and they take care of you well. ## Frequently asked questions about Zone 21 ### What is Zone 21? Zone 21 is a math-based solitaire card game where players aim to keep their card total between 0 and 21. It offers multiplayer challenges and the opportunity to win real cash prizes where available. ### How do I win in Zone 21? You win by clearing cards from the table while keeping your total between 0 and 21. Hitting exactly 21 earns bonus points. Competing against opponents in timed matches and achieving high scores on leaderboards is key to winning prizes. ### Can I play Zone 21 offline? The description highlights multiplayer features and competing against friends and players around the world, suggesting an internet connection is required for full functionality, especially for prize-based games. ### Does Zone 21 have ads? Yes, Zone 21 contains advertisements. This is indicated by the 'hasAds' flag being true in the application data. ### What devices support Zone 21? Zone 21 is supported on iPhone, iPad, and iPod devices. It was released on November 22, 2019, and its latest version is 1.1.5, last updated on May 20, 2023. ### What is the age rating for Zone 21? Zone 21 has an age rating of 17+. This is due to its inclusion of real money gambling and mature themes. ### How often is Zone 21 updated? Zone 21 was last updated on May 20, 2023, indicating regular updates to improve the game and its features. The latest version is 1.1.5. ### Where can I get help with Zone 21? For questions or proposals regarding the game, you can contact support@ccbrothers.com. For questions about the Skillz system or cash tournaments, contact support@skillz.com. ## Version history (last 5 releases) ### 1.1.5 — 2023-05-20 • bug fixes ### 1.1.2 — 2023-02-21 • Bug fixes and improved stability ### 1.1.1 — 2022-03-31 • A brand new storefront for redeeming prizes • Bug fixes and improved stability ### 1.0.6 — 2020-07-15 • bug fix • faster cards ### 1.0.5 — 2020-07-13 • bug fix ## Apps similar to Zone 21 | App | Rating | Price | Category | | --- | --- | --- | --- | | [Roblox](https://appshunter.io/ios/app/roblox/id431946152) | 4.5 (18,902,815) | Free | Games | | [Subway Surfers](https://appshunter.io/ios/app/subway-surfers/id512939461) | 4.6 (3,738,185) | Free | Games | | [Big Win Solitaire: Cash Prizes](https://appshunter.io/ios/app/big-win-solitaire-cash-prizes/id1504187859) | 4.7 (238) | Free | Games | | [Block Blast！](https://appshunter.io/ios/app/block-blast/id1617391485) | 4.9 (2,514,865) | Free | Games | | [Dice Cash: Win Real Money](https://appshunter.io/ios/app/dice-cash-win-real-money/id1598069834) | 4.8 (49) | Free | Games | | [Rolling Puzzle](https://appshunter.io/ios/app/rolling-puzzle/id1571149162) | 4.9 (11) | Free | Games | ## More apps by CodeCube Brothers Partnership - [Klondike Solitaire Hearts & Spades Patience](https://appshunter.io/ios/app/klondike-solitaire-hearts-and-spades-patience/id579978615) - [Spider Solitaire Hearts & Spades Patience](https://appshunter.io/ios/app/spider-solitaire-hearts-and-spades-patience/id579980124) - [Color Sudoku Mint Pastel](https://appshunter.io/ios/app/color-sudoku-mint-pastel/id622665941) - [Pandora's Solitaire Collection](https://appshunter.io/ios/app/pandoras-solitaire-collection/id663653089) - [Forty Thieves Solitaire Hearts & Spades Patience](https://appshunter.io/ios/app/forty-thieves-solitaire-hearts-and-spades-patience/id770528912) - [Rope Heroes : Hole Runner Game](https://appshunter.io/ios/app/rope-heroes-hole-runner-game/id1022801678) All apps by CodeCube Brothers Partnership: https://appshunter.io/developer/415118511 ## Related topics [math cash](https://appshunter.io/ios/topics/math-cash) · [fast math blitz](https://appshunter.io/ios/topics/fast-math-blitz) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*