Blackjack 21: online casino: iPhone vs Android
Blackjack 21: online casino gets 100+ downloads a day worldwide (AppInsider estimate, September 2026, rounded down to a band).
Blackjack 21: online casino by CYBERNAUTICA s.r.o. is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Rating
4.5 ★
4.8k ratings, both stores
Measured
Best rank now
#76
Android · 
Games › Casino Free
Games › Casino FreeMeasured
App Store
App details
App ID
1536928166
Publisher
CYBERNAUTICA s.r.o.
Publisher country
Czechia
Minimum OS
iOS 15.0+
Content rating
17+
Languages
1
EN
Size
215 MB
Google Play
App details
App ID
bds.mobile.casino.blackjack
Publisher
CYBERNAUTICA s.r.o.
Publisher country
Czechia
Content rating
Teen
Blackjack 21: online casino downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | 50+ | 10k+ |
| Google Play | 50+ | 500k+ Measured |
| Total | 100+ Confidence | 500k+ Confidence |
How this is calculated
iPhone: chart positions and rating growth per country, anchored on its own Android downloads; lifetime from ratings worldwide × installs per rating. Google Play: the daily change in its exact install count. The total adds every store.
Where Blackjack 21: online casino's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend before Apple and Google take their fee.
| Store | Per day | Per month | Share |
|---|---|---|---|
| App Store | |||
| Google Play | |||
| Total | Confidence | 100% |
Business model: In-app purchase-led
How Blackjack 21: online casino makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 9 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 5.0 ★ | 1 |
| Google Play | 4.5 ★ | 4.8k 206 written reviews |
| Both stores | 4.5 ★ weighted by ratings | 4.8k |
About Blackjack 21: online casino
Looking for new Casino Games? BlackJack card game is here to offer breathtaking card gaming fun. From global players and amazing new tournaments to daily free chips and weekly rewards, this blackjack online is all about offering upbeat card gaming fun.
Master your blackjack skills by practicing on online slots and participate in global
tournaments when you are ready.
Wondering how to play BlackJack 21? All you need to do is beat the dealer by having a
card total that doesn’t exceed 21!
Play the game now!
Who doesn’t love a card game offering exciting new rewards? The new casino slot
game offers huge free chip stacks for all the players. You can not only get to enjoy free
diamonds but also greeting chips once you spin to win the mega wheel. Win chips and
diamonds with a free spin that unlocks after every 24 hours!
Want to play Classic slot game online anonymously? Switch to the Guest game mode
and play Diamond league tournaments and win exciting new rings collection. Complete
daily missions and reserve your spot in top 100 weekly players.
Want to play Casino slot game in different cities? The game features multiple contents
including the majestic cities of Atlantic City, Macau city, Singapore and the Carnival Last
legend casino in Hawaii. You can also choose to double down in Bellagio in Las Vegas.
Become the best blackjack player in the world as you appeal to the exciting graphics of
different continents in this game.
Create profiles and show off your achievements to other players! You can also view
other people’s profiles to stay inspired. Become the king of BlackJack and impress
everyone around you!
Features of Blackjack 21: online casino – Blackjack 21 & Slots Free
• Simple and easy casino slot games UI/UX
• Appealing Vegas Casino game layout with striking design elements
• Smooth and responsive spin to win controls for streamlined gaming fun
• Win free huge chip stacks to enjoy free diamonds
• Spin to win free diamonds and greeting chips
• Option to play blackjack anonymously by switching to guest mode
• Create and customize blackjack card game profiles and level up as you win
• View other players profiles and stay inspired
• Complete exciting daily challenges and stay on top of your game
• Weekly top 100 winners selection for exciting gaming experience
Are you ready to become the global blackjack online king? If yes, this game is all you
need. Download and play Blackjack 21: online casino – Blackjack 21 & Slots Free today!
This casino game is intended for an adult audience (21+) for amusement purposes only
and does not offer "real money" gambling, or an opportunity to win real money or prizes
based on game play. Playing or success in this game does not imply future success at
"real money" gambling.
Created with love by CYBERNAUTICA
Terms of Use: https://cybernautica.cz/terms-of-service/
Indonesia (IGRS): 18+
Master your blackjack skills by practicing on online slots and participate in global
tournaments when you are ready.
Wondering how to play BlackJack 21? All you need to do is beat the dealer by having a
card total that doesn’t exceed 21!
Play the game now!
Who doesn’t love a card game offering exciting new rewards? The new casino slot
game offers huge free chip stacks for all the players. You can not only get to enjoy free
diamonds but also greeting chips once you spin to win the mega wheel. Win chips and
diamonds with a free spin that unlocks after every 24 hours!
Want to play Classic slot game online anonymously? Switch to the Guest game mode
and play Diamond league tournaments and win exciting new rings collection. Complete
daily missions and reserve your spot in top 100 weekly players.
Want to play Casino slot game in different cities? The game features multiple contents
including the majestic cities of Atlantic City, Macau city, Singapore and the Carnival Last
legend casino in Hawaii. You can also choose to double down in Bellagio in Las Vegas.
Become the best blackjack player in the world as you appeal to the exciting graphics of
different continents in this game.
Create profiles and show off your achievements to other players! You can also view
other people’s profiles to stay inspired. Become the king of BlackJack and impress
everyone around you!
Features of Blackjack 21: online casino – Blackjack 21 & Slots Free
• Simple and easy casino slot games UI/UX
• Appealing Vegas Casino game layout with striking design elements
• Smooth and responsive spin to win controls for streamlined gaming fun
• Win free huge chip stacks to enjoy free diamonds
• Spin to win free diamonds and greeting chips
• Option to play blackjack anonymously by switching to guest mode
• Create and customize blackjack card game profiles and level up as you win
• View other players profiles and stay inspired
• Complete exciting daily challenges and stay on top of your game
• Weekly top 100 winners selection for exciting gaming experience
Are you ready to become the global blackjack online king? If yes, this game is all you
need. Download and play Blackjack 21: online casino – Blackjack 21 & Slots Free today!
This casino game is intended for an adult audience (21+) for amusement purposes only
and does not offer "real money" gambling, or an opportunity to win real money or prizes
based on game play. Playing or success in this game does not imply future success at
"real money" gambling.
Created with love by CYBERNAUTICA
Terms of Use: https://cybernautica.cz/terms-of-service/
Indonesia (IGRS): 18+
Blackjack 21: online casino iPhone
Blackjack 21: online casino gets 100+ downloads a day worldwide (AppInsider estimate, September 2026, rounded down to a band).
Blackjack 21: online casino is #82 in Games › Casino Free in Brazil and charting in 1 of 24 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperCYBERNAUTICA s.r.o.
CategoryGames
PriceFree
Released
Rating★ 5.0 (1)
Version5.5
Age rating17+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)10k+ worldwide
Rating
5.0 ★
1 ratings
Measured
Best rank now
#82
Games › Casino FreeMeasured
Blackjack 21: online casino on the App Store
App details
App ID
1536928166
Publisher
CYBERNAUTICA s.r.o.
Publisher country
Czechia
Minimum OS
iOS 15.0+
Content rating
17+
Languages
1
EN
Size
215 MB
Blackjack 21: online casino downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Blackjack 21: online casino's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Blackjack 21: online casino before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Blackjack 21: online casino makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 9 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| Brazil | Games › CasinoFree | #82 |
Apps near Blackjack 21: online casino on the chart
Games › Casino Free, around #82.
Ratings
App Store, worldwide.
Rating
5.0 ★
1 ratings
Measured
Ratings
1
Measured
About Blackjack 21: online casino
Looking for new Casino Games? BlackJack card game is here to offer breathtaking card gaming fun. From global players and amazing new tournaments to daily free chips and weekly rewards, this blackjack online is all about offering upbeat card gaming fun.
Master your blackjack skills by practicing on online slots and participate in global
tournaments when you are ready.
Wondering how to play BlackJack 21? All you need to do is beat the dealer by having a
card total that doesn’t exceed 21!
Play the game now!
Who doesn’t love a card game offering exciting new rewards? The new casino slot
game offers huge free chip stacks for all the players. You can not only get to enjoy free
diamonds but also greeting chips once you spin to win the mega wheel. Win chips and
diamonds with a free spin that unlocks after every 24 hours!
Want to play Classic slot game online anonymously? Switch to the Guest game mode
and play Diamond league tournaments and win exciting new rings collection. Complete
daily missions and reserve your spot in top 100 weekly players.
Want to play Casino slot game in different cities? The game features multiple contents
including the majestic cities of Atlantic City, Macau city, Singapore and the Carnival Last
legend casino in Hawaii. You can also choose to double down in Bellagio in Las Vegas.
Become the best blackjack player in the world as you appeal to the exciting graphics of
different continents in this game.
Create profiles and show off your achievements to other players! You can also view
other people’s profiles to stay inspired. Become the king of BlackJack and impress
everyone around you!
Features of Blackjack 21: online casino – Blackjack 21 & Slots Free
• Simple and easy casino slot games UI/UX
• Appealing Vegas Casino game layout with striking design elements
• Smooth and responsive spin to win controls for streamlined gaming fun
• Win free huge chip stacks to enjoy free diamonds
• Spin to win free diamonds and greeting chips
• Option to play blackjack anonymously by switching to guest mode
• Create and customize blackjack card game profiles and level up as you win
• View other players profiles and stay inspired
• Complete exciting daily challenges and stay on top of your game
• Weekly top 100 winners selection for exciting gaming experience
Are you ready to become the global blackjack online king? If yes, this game is all you
need. Download and play Blackjack 21: online casino – Blackjack 21 & Slots Free today!
This casino game is intended for an adult audience (21+) for amusement purposes only
and does not offer "real money" gambling, or an opportunity to win real money or prizes
based on game play. Playing or success in this game does not imply future success at
"real money" gambling.
Created with love by CYBERNAUTICA
Terms of Use: https://cybernautica.cz/terms-of-service/
Indonesia (IGRS): 18+
Master your blackjack skills by practicing on online slots and participate in global
tournaments when you are ready.
Wondering how to play BlackJack 21? All you need to do is beat the dealer by having a
card total that doesn’t exceed 21!
Play the game now!
Who doesn’t love a card game offering exciting new rewards? The new casino slot
game offers huge free chip stacks for all the players. You can not only get to enjoy free
diamonds but also greeting chips once you spin to win the mega wheel. Win chips and
diamonds with a free spin that unlocks after every 24 hours!
Want to play Classic slot game online anonymously? Switch to the Guest game mode
and play Diamond league tournaments and win exciting new rings collection. Complete
daily missions and reserve your spot in top 100 weekly players.
Want to play Casino slot game in different cities? The game features multiple contents
including the majestic cities of Atlantic City, Macau city, Singapore and the Carnival Last
legend casino in Hawaii. You can also choose to double down in Bellagio in Las Vegas.
Become the best blackjack player in the world as you appeal to the exciting graphics of
different continents in this game.
Create profiles and show off your achievements to other players! You can also view
other people’s profiles to stay inspired. Become the king of BlackJack and impress
everyone around you!
Features of Blackjack 21: online casino – Blackjack 21 & Slots Free
• Simple and easy casino slot games UI/UX
• Appealing Vegas Casino game layout with striking design elements
• Smooth and responsive spin to win controls for streamlined gaming fun
• Win free huge chip stacks to enjoy free diamonds
• Spin to win free diamonds and greeting chips
• Option to play blackjack anonymously by switching to guest mode
• Create and customize blackjack card game profiles and level up as you win
• View other players profiles and stay inspired
• Complete exciting daily challenges and stay on top of your game
• Weekly top 100 winners selection for exciting gaming experience
Are you ready to become the global blackjack online king? If yes, this game is all you
need. Download and play Blackjack 21: online casino – Blackjack 21 & Slots Free today!
This casino game is intended for an adult audience (21+) for amusement purposes only
and does not offer "real money" gambling, or an opportunity to win real money or prizes
based on game play. Playing or success in this game does not imply future success at
"real money" gambling.
Created with love by CYBERNAUTICA
Terms of Use: https://cybernautica.cz/terms-of-service/
Indonesia (IGRS): 18+
Latest updates
5.5
This update includes bug fixes and other improvements.
More from CYBERNAUTICA s.r.o.
Blackjack 21: online casino Android
Blackjack 21: online casino gets 100+ downloads a day worldwide (AppInsider estimate, September 2026, rounded down to a band).
Blackjack 21: online casino is #82 in Games › Casino Free on Google Play in France and charting in 4 of 15 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperCYBERNAUTICA
CategoryGames › Casino
PriceFree
Released
Installs500k+
Rating★ 4.5 (4.8k)
Updated
Content ratingTeen
Rating
4.5 ★
4.8k ratings
Measured
Best rank now
#82
Games › Casino FreeMeasured
Blackjack 21: online casino on Google Play
App details
App ID
bds.mobile.casino.blackjack
Publisher
CYBERNAUTICA s.r.o.
Publisher country
Czechia
Content rating
Teen
Blackjack 21: online casino downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Where Blackjack 21: online casino's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Blackjack 21: online casino before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Blackjack 21: online casino makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 9 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 15 countries.
| Country | Charts | Rank |
|---|---|---|
| France | Games › CasinoFree | #82 |
| Russia | Games › CasinoFree | #76 |
| Brazil | Games › CasinoFree | #156 |
 India | Games › CasinoFree | #200 |
Apps near Blackjack 21: online casino on the chart
Games › Casino Free, around #82.
Ratings
Google Play, worldwide.
Rating
4.5 ★
4.8k ratings
Measured
Ratings
4.8k
Measured
Written reviews
206
Measured
About Blackjack 21: online casino
Looking for new casino games? Play slots & blackjack online now. Online casino with Blackjack 21 card game and free slot machines are here for you.
Global players, amazing new tournaments, daily free chips, and
weekly rewards - enjoy blackjack free in your personal mobile casino.
Master your blackjack skills and participate in global tournaments when you are ready.
Wondering how to play Blackjack 21? All you need to do is beat the dealer by having a card total that doesn’t exceed 21!
Play the game now!
Free chips daily
Who doesn’t love a card game offering exciting new rewards? The new blackjack 21 & casino slot game offers huge free chip stacks for all the players. Enjoy free diamonds, greeting chips, or win the diamonds and chips in the mega wheel. Enjoy your free spins!
Time for fast and fun blackjack and slot machines
Enjoy fast and fun blackjack 21 and master your skills! If you are looking for pure relaxation - try slot machines free! You don't need real money to enjoy slots or blackjack free.
Real casino vibe
Atlantic City, Macau, Singapore, Hawaii, or Las Vegas Casino - you need just your mobile casino to enjoy the gambling fun.
Features of Blackjack Casino 2021 – Blackjack 21 & Slots Free
• Simple and easy casino slot games UI/UX
• Appealing Vegas Casino game layout with striking design elements
• Smooth and responsive spin to win controls for streamlined gaming fun
• Win free huge chip stacks to enjoy free diamonds
• Spin to win free diamonds and greeting chips
• Option to play blackjack anonymously by switching to guest mode
• Create and customize blackjack card game profiles and level up as you win
• View other players profiles and stay inspired
• Complete exciting daily challenges and stay on top of your game
• Weekly top 100 winners selection for an exciting gaming experience
Do you want to become the global blackjack master or just play blackjack 21 for fun? This game is all you need. Download and play Blackjack 21: online casino!
This casino game is intended for an adult audience for amusement purposes only and does not offer "real money" gambling, or an opportunity to win real money or prizes. Playing or success in this game does not imply future success at "real money" gambling.
Created with love by CYBERNAUTICA 2018 - 2021
Privacy Policy: https://cybernautica.cz/privacy-policy/
Terms of Service: https://cybernautica.cz/terms-of-service/
Global players, amazing new tournaments, daily free chips, and
weekly rewards - enjoy blackjack free in your personal mobile casino.
Master your blackjack skills and participate in global tournaments when you are ready.
Wondering how to play Blackjack 21? All you need to do is beat the dealer by having a card total that doesn’t exceed 21!
Play the game now!
Free chips daily
Who doesn’t love a card game offering exciting new rewards? The new blackjack 21 & casino slot game offers huge free chip stacks for all the players. Enjoy free diamonds, greeting chips, or win the diamonds and chips in the mega wheel. Enjoy your free spins!
Time for fast and fun blackjack and slot machines
Enjoy fast and fun blackjack 21 and master your skills! If you are looking for pure relaxation - try slot machines free! You don't need real money to enjoy slots or blackjack free.
Real casino vibe
Atlantic City, Macau, Singapore, Hawaii, or Las Vegas Casino - you need just your mobile casino to enjoy the gambling fun.
Features of Blackjack Casino 2021 – Blackjack 21 & Slots Free
• Simple and easy casino slot games UI/UX
• Appealing Vegas Casino game layout with striking design elements
• Smooth and responsive spin to win controls for streamlined gaming fun
• Win free huge chip stacks to enjoy free diamonds
• Spin to win free diamonds and greeting chips
• Option to play blackjack anonymously by switching to guest mode
• Create and customize blackjack card game profiles and level up as you win
• View other players profiles and stay inspired
• Complete exciting daily challenges and stay on top of your game
• Weekly top 100 winners selection for an exciting gaming experience
Do you want to become the global blackjack master or just play blackjack 21 for fun? This game is all you need. Download and play Blackjack 21: online casino!
This casino game is intended for an adult audience for amusement purposes only and does not offer "real money" gambling, or an opportunity to win real money or prizes. Playing or success in this game does not imply future success at "real money" gambling.
Created with love by CYBERNAUTICA 2018 - 2021
Privacy Policy: https://cybernautica.cz/privacy-policy/
Terms of Service: https://cybernautica.cz/terms-of-service/
What's new in 5.5
Enjoy popular free blackjack and other casino games right here.
Playing online blackjack for free also helps you to develop your strategy without risking your own cash.
Playing online blackjack for free also helps you to develop your strategy without risking your own cash.