About
Practice your blackjack strategy with a modern, minimalist simulator. Enjoy realistic gameplay, offline play, and unlockable customizations. Perfect for beginners and experts alike to hone their card skills.
What's New in SimpleJack 21
2.3.0
July 13, 2026
The climb just got epic. 105 new levels take you all the way to Level 150! • 21 new tables and 10 unique card decks to unlock as you rise, from Starfall Terrace to the legendary Infinity Table • Bigger milestone rewards, coins and boosts waiting at every step
MoreIn-App Purchases
$3.99
Remove Ads
This package is removing the in game ads
Events
Climb 30 levels. Earn summer card rewards.
May 28, 2026 — Jun 28, 2026
Developer apps
FAQ
Does SimpleJack 21 have ads?
Yes, SimpleJack 21 contains advertisements. This allows the game to be offered for free while still providing a full simulation experience.
Can I play SimpleJack 21 offline?
Yes, SimpleJack 21 offers uninterrupted offline gameplay. You can hone your blackjack strategy anywhere without needing an internet connection.
What is the age rating for SimpleJack 21?
SimpleJack 21 is rated 17+ and is intended for adult audiences for entertainment purposes only. It does not offer real money gambling.
How does SimpleJack 21 ensure fair play?
SimpleJack 21 uses a cryptographic random number generator for every hand. This ensures a truly unpredictable and authentic blackjack experience.
What devices does SimpleJack 21 support?
SimpleJack 21 is supported on iPhone, iPad, and iPod devices.
How often is SimpleJack 21 updated?
The latest version, 2.3.0, was released on July 13, 2026. Updates are provided to enhance the user experience and maintain game integrity.
What are the in-app purchases in SimpleJack 21?
In-app purchases in SimpleJack 21 primarily involve unlocking unique table themes and card designs to personalize your gameplay experience.
What is the goal of SimpleJack 21?
The goal is to beat the dealer by getting a hand value as close to 21 as possible without going over. It's a simulation to practice your decision-making skills.