Blackjack 21: Casino Card Game
Contains adsIn-app purchases
4.5star
15.2K reviewsinfo
500K+
Downloads
USK: Ages 16+
info
About this game
This is a free, authentic casino Blackjack gambling game, also known as twenty-one or 21, that you can play against the dealer. Enjoy a classic casino card game with popular Las Vegas rules just like at a real casino. Download this app if you fancy playing slot machines or slots and blackjack, or if you simply want to learn how to play Black Jack 21 in a casino and hone your gambling skills to be prepared for your Vegas trip.
Top Features of the Game:
Unlimited free chips
Fair play guaranteed with a 100% truly random card shuffler and deck shuffle animation
Authentic Blackjack experience
Options to Double Down, Split, Insure, and Surrender
By default, the game is played with a single deck
Simple, easy-to-play game with smart controls
Tips based on Blackjack strategy charts
Game statistics and free chips after bankruptcy
Brilliant graphics with large, easy-to-read cards
Learn how to beat the casino and master blackjack as played in the casino
Easy to play, incredibly fun, addictive, and a challenging game
Basic Rules and How to Play:
In Blackjack, your aim is to build a hand with a higher value than the dealer's without going over 21. Aces may count as either 11 or 1, face cards are valued at 10, and all other cards are worth the number they show. Any hand containing an Ace and a face card is known as a Blackjack.
NOTE: This is NOT a real money gambling game.
This game is intended for an adult audience and does not offer "real money gambling" or an opportunity to win real money or prizes.
We'd love to hear what you think of this card game and would appreciate it if you rated us.
Created by CYBERNAUTICA
Privacy Policy: https://cybernautica.cz/privacy-policy/
Terms of Service: https://cybernautica.cz/terms-of-service/
Top Features of the Game:
Unlimited free chips
Fair play guaranteed with a 100% truly random card shuffler and deck shuffle animation
Authentic Blackjack experience
Options to Double Down, Split, Insure, and Surrender
By default, the game is played with a single deck
Simple, easy-to-play game with smart controls
Tips based on Blackjack strategy charts
Game statistics and free chips after bankruptcy
Brilliant graphics with large, easy-to-read cards
Learn how to beat the casino and master blackjack as played in the casino
Easy to play, incredibly fun, addictive, and a challenging game
Basic Rules and How to Play:
In Blackjack, your aim is to build a hand with a higher value than the dealer's without going over 21. Aces may count as either 11 or 1, face cards are valued at 10, and all other cards are worth the number they show. Any hand containing an Ace and a face card is known as a Blackjack.
NOTE: This is NOT a real money gambling game.
This game is intended for an adult audience and does not offer "real money gambling" or an opportunity to win real money or prizes.
We'd love to hear what you think of this card game and would appreciate it if you rated us.
Created by CYBERNAUTICA
Privacy Policy: https://cybernautica.cz/privacy-policy/
Terms of Service: https://cybernautica.cz/terms-of-service/
Updated on
Available on
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Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
Ratings and reviews
4.5
13.9K reviews
A Google user
- Flag inappropriate
20 October 2025
Fun to pass the time. I've noticed a tendency for the game to make you lose any time you bet more than half though, which is unrealistic and not fun. Also the game doesn't call blackjack like at least half the times I get it. Know what else isn't fun? Ads. Especially with no permanent solution, but a "subscription" requirement. That's gross.
CYBERNAUTICA
20 October 2025
Hi, thanks for playing with us. Unfortunately, ads are needed to keep the blackjack free for everyone. The ads stop showing after any in-game purchase. Have a nice day :)
Todd Edegerton
- Flag inappropriate
30 September 2025
It's a very simple and enjoyable game. Not too sure about the odds, looks like just a single deck instead of the 5 I'm accustomed to. My only complaint about the game is that I can't figure out how to turn off the hint/suggestion function. I know how I want to play my hand, and find it distracting, and exceedingly annoying, especially when it's right. The ads come too often, are too long, and tedious to get rid of, but that's true about almost all free online games.
8 people found this review helpful
CYBERNAUTICA
30 September 2025
Hello, thank you for playing blackjack with us. Unfortunately, ads are needed to keep the game free. You can remove the ads by any purchase in the shop. We wish you all the best!
Dom bomb
- Flag inappropriate
21 August 2025
it's a simple and fun game but I have a couple things I have problems with, when the dealer has a natural 21 they just win you don't get to play out the hand and I've had hands where if I could pull one more card I'd have 21 and push. the other thing is I've reached $10 million and the game seems to have some glitches at this point, the game runs slow and the cards take a sec to deal if those 2 things got fixed the game would be amazing.
3 people found this review helpful
CYBERNAUTICA
21 August 2025
Thanks for playing with us. We are sorry that you are experiencing technical issues. Can you, please, send us more details through e-mail?
What's new
Thank you for playing the best Blackjack 21 app for free.
App support
About the developer
CYBERNAUTICA s.r.o.
games@cybernautica.cz
988/2 Nové sady
602 00 Brno
Czechia
+420 733 731 087
