21 Blitz - Blackjack for Cash 17+

Win Real Money with Real Skill

Tether Studios, LLC

    • 4.6 • 28.5K Ratings
    • Free



21 Blitz is a mix of 21 and Solitaire. It's a perfect way to practice your 21 skills, train your brain or just pass the time.

Play against real people for free then switch to cash games when you're ready to compete and win!

How to Play
• Make 21s or stacks of 5 cards to score points.
• Each game has 1 full deck of cards, a perfect challenge for aspiring card counters.
• Finish the deck before the clock runs out and you'll receive a time bonus.
• Find Combos and Streak bonuses to perfect your strategy.

No longer a solitary experience!
• Games can be played Head to Head with other players or in large, multiplayer tournaments.
• In head to head games, both players solve the same deck and the player who finishes with the most points wins.
• 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!
• Prize tournaments are available in about 75% of the world. Prize tournaments are not enabled in the following states: AR, CT, DE, IN, LA, ME, and SD. If you don't live in a real prize-enabled region, you can still play for fun with our virtual currency.

If you have any questions feel free to reach us at info@tetherstudios.com
If you have any questions about the Skillz system or cash tournaments please contact: support@skillz.com

What’s New

Version 1.48

New optimizations and bug fixes

Ratings and Reviews

4.6 out of 5
28.5K Ratings

28.5K Ratings

math0310 ,


It’s fun to play but I did notice that when you play for tickets you win more then lose and when you play for cash you lose a lot more then you win I went through 100$ in less then a hour because there is a tournament every hour and at first it makes you think it’s 1.00$ to play for the hour no it’s a 1.00 a game plus I went from being 80th 3 rd back up to 23th which was not fair I thought once you were up in the top ten you would stay there but as long as people are still playing and bumping you out with getting higher scores till the whole hour is up . So be careful of that otherwise there are a lot of different ways to play 21 on here there is a three card peak and one that holds a card and one that undoes what you did. So just make sure you read the rules of each one before playing it so you don’t loose crazy money like i did because they don’t give you any money only tickets every day to play the tickets games . Good luck to all I truly hope you win

Developer Response ,

Thanks! We love a good challenge and are glad to hear you do too. If you ever want tips and tricks to up your game, check out our website: tetherstudios.com/tips, where we feature advanced strategy tips for all of our games :) - Tether Studios

DuoTooTwo ,

fair warning - 0 chance

totally rigged and very misleading on just about everything.
1. every $1 game the 2 players each risk $.60. At the end of the match the winner takes $1.00 and house keeps $.20. Win 5 games you win actually $5 but it cost you $3.00 to play so at the end you will a grand total of $2.00 more than you started. Now you loose 5 games in a row and you loose a total of $3.00. But the catch is after a week or so of building the confidence of players you start loosing by few points, winning a few and loosing a few. Each time you are now waiting for a challenger only to be beaten by someone that finishes shortly after you finish. Then a reply is available to watch the match but guess what - wrong those games the app states that the challenger might have a battery issue and the match can not be viewed sorry. Completely opposite of what they say that every game is viewable which is completely false. So fair warning - just take what you have to spend then double it is what at the end will be how much you lost. Once they go public the auditors will be able to check the top 10 winners everyday for the last few years and if all tax documents are in order....but those players in most cases are actually not real - pre recorded events matched only after you complete your session. your chances of winning $10 a week even after playing 100 games in a week winning $500 the net winnings might be only a few dollars left in the account. Just saying,

Angelsbty3 ,

So much fun!

I am having a great time playing this game! I might even say that I have a hard time getting my face out of my phone sometimes! LOL! And when I had a question, there was a bit of a language barrier, I think, but they never gave up and they were still very quick to answer even though it took a few tries before one of their customer service agents were able to fully answer my questions, so I have to rate them highly for that as many companies don’t bother to answer or they get rude as if it’s me that is supposed to be providing them with a good experience. This company has been polite and helpful and patient and they were very concerned that my question was not being answered to my satisfaction. Awesome customer care in my book! So, I’m going to keep have a great time and if I spend a little money, well, I am ok with that and if I win a little money, I’m really ok with that, too! But most of all it’s a lot of fun!

App Privacy

The developer, Tether Studios, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • Financial Info
  • Location
  • Contact Info
  • Contacts
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Game Center

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