21 Blitz is a brilliant hybrid of Blackjack and Solitaire that turns a solitary card game into a high-stakes competitive esport. The core concept is simple: you have four stacks and a deck of cards, and you need to make as many 21s as possible before the timer runs out. It sounds easy, but the strategy comes in managing your 'busts' and maximizing your streak bonuses to outscore your opponent.
The Skillz integration is seamless, allowing you to play for virtual currency to practice or jump into cash tournaments to test your skill against real people. The matchmaking is very fair, ensuring you’re always playing against someone with a similar skill level. It’s fast, polished, and incredibly addictive—the perfect game for anyone who loves card games and the thrill of competition.
Available on: iPhone, iPad, iPod
Version 1.52Thu Feb 27 2025
New performance optimizations and bug fixes
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
Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.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




















21 Blitz is a unique card game that blends the strategy of Blackjack with the speed of Solitaire. Players are challenged to make 21s or stacks of 5 cards to score points while racing against the clock. Powered by Skillz, the game allows for head-to-head competition and multiplayer tournaments. Players can win trophies, virtual currency, or even real-world prizes (where available) by outscoring their opponents using the same deck of cards.
Fast-paced Blackjack/Solitaire hybrid gameplay
Real-money tournaments and prizes via Skillz
Fair matchmaking with players of equal skill
Daily rewards and loyalty program bonuses
Ad-free gameplay for an uninterrupted experience
Focus on the '5-card Charlie' bonus. If you can stack five cards in a pile without going over 21, you get a massive point boost. Save your 'Wild' Jacks for when you're stuck or close to a 5-card stack.
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In head-to-head matches, both players get the exact same deck. The winner is determined by efficiency and speed. Don't just aim for 21; aim for combos and finishing the deck early to get the time bonus.
Cash tournaments are available in most locations worldwide, but restricted in some US states. You can always play for free with virtual currency.