21 Blitz is a mix of Blackjack and Solitaire. It's a perfect way to practice your blackjack 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 win.
• Challenge people around the world with Skillz, a competition platform complete with leaderboards, trophies, Cash or virtual currency prizes, and an amazing loyalty program that rewards you for playing!
• Cash tournaments are available in about 75% of the world. Cash tournaments are not enabled in the following states: AZ, AR, CT, DE, FL, IL, IN, LA, MD, ME, MT, SC, SD, and TN. If you don't live in a cash-enabled region, you can still play for free.

If you have any questions feel free to reach us at
If you have any questions about the Skillz system or cash tournaments please contact:

What's New

Version 1.03

• Updated the game audio to be a little less abrupt
• Fixed the end-game summary stats display
• Fixed the golf solitaire link on the home screen

Ratings and Reviews

4.9 out of 5

27 Ratings

27 Ratings

Super fun

Lucky and Smart

Great combination of blackjack with a hint of solitaire. One deck makes it so you can kinda count cards too which is neat. I’m just learning the cash game strategy too which adds another dimension.



Love all he games. It would be even better if here were more things for the people who can’t win money though

My favorite tether game


Quick paced fun. Easy to get into but gets deeper the more you play. Really fun so far!


Tether Studios Inc
135.2 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, German, Italian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish
Age Rating
You must be at least 17 years old to download this app.
Frequent/Intense Simulated Gambling
Gambling and Contests
© 2018 Tether Studios Inc


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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