21 Blitz: Single Player
21 Blitz: Single Player Summary
21 Blitz: Single Player is a free, ad-supported, with in-app purchases Android app in Card by Tether Studios LLC. Released in Apr 2021 (5 years ago). It has about 209K+ installs and 599 ratings with a 3.67★ (average) average. Store last updated Feb 16, 2024
Recent activity: 84 installs this week (199 over 4 weeks) showing steady growth View trends →
Advertising: AppGoblin detected 1.00 monetized ad creatives shown inside the app.
SDK intelligence: AppGoblin detected 6 development tools(e.g. JetBrains IntelliJ), 2 analytics: product, 2 ad networks,and 1 analytics: attribution integrated into 21 Blitz: Single Player. View full SDK list →
Data tracking: The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Jul 13, 2025.
21 Blitz: Single Player SDKs Summary
21 Blitz: Single Player was last scanned for SDKs on 2025-10-15. Below is the overview of third-party companies detected in the app. The full list of SDKs, permissions and unknowns is available here.
AppGoblin saw 21 Blitz: Single Player uses 2 Analytics: Product
Amplitude
FirebaseAppGoblin saw 21 Blitz: Single Player uses 2 Ad Networks
Facebook
GoogleAppGoblin saw 21 Blitz: Single Player uses 1 Analytics: Attribution
AppsFlyerAppGoblin saw 21 Blitz: Single Player uses 6 Development Tools
JetBrains IntelliJ
Unity
JetBrains3.67★
Ratings: 599
Screenshots
App Description
Practice your classic Blackjack skills in a modern version of the card game.
Welcome to the official "21 Blitz: Single Player" experience! Blackjack meets Solitaire; a perfect challenge for aspiring card counters.
A game may only take a few minutes to play but you'll be setting high scores for hours! Enjoy a casual experience or reach a competitive level of play. You decide!
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HOW TO PLAY
• Each turn, choose from 1 of the 4 lanes to play a card.
• Make card stacks that add up to 21 to score points.
• Going over 21 will bust the lane. 3 busts and it's game over.
• String together combos and streak bonuses to perfect your strategy.
• Finish the deck before the clock runs out and you'll also receive a time bonus.
KEY FEATURES
• Play fast games on the go or from the comfort of your home!
• Leverage the "UNDO" button to peek ahead at the next card or reset any busts!
• Maximize your score with streaks and lane bonuses!
• Replay the same deck back-to-back to search for ways to improve your score!
• Learn tips and tricks from the included "How to Play" guide!
• Explore alternate game modes that introduce new challenges!
• Engage with smooth touch controls on all devices!
• Treat yourself to fast loading times and smooth animations!
• Challenge yourself to improve your best scores!
• Customize your card backs and background art!
• Rekindle your love of Blackjack!
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