Protocol 21 for iPhone & iPad
Download the #1 blackjack card counting trainer for iOS. Master Hi-Lo, KO, Omega II, and other counting systems with casino-grade training drills. Free for iPhone and iPad.
4.8/5 Rating
User Reviews
Full Access
iOS-Optimized Features
Retina Display Support
Stunning graphics optimized for iPhone and iPad Retina displays. Sharp card graphics and clear readability on all screen sizes.
Touch Gesture Controls
Intuitive swipe and tap controls designed specifically for touch screens. Responsive drills with natural iOS interaction patterns.
Optimized Battery Usage
Efficient code and smart background processing mean longer training sessions without draining your battery.
Dark Mode Support
Seamless Dark Mode integration protects your eyes during late-night training sessions on iOS devices.
Accessibility Features
Full VoiceOver support, adjustable text sizes, and accessibility options ensure Protocol 21 works for everyone.
Universal App
One app download works seamlessly on iPhone and iPad with optimized layouts for each screen size.
System Requirements
How to Download & Install
Open App Store
Launch the App Store app on your iPhone or iPad.
Search for Protocol 21
Use the search tab to find "Protocol 21 Blackjack Counter".
Tap Get
Tap the "Get" button, then authenticate with Face ID, Touch ID, or your Apple password.
Wait for Installation
The app will download and install automatically. Wait for "Open" to appear.
Launch & Start Training
Tap "Open" to launch Protocol 21 and begin your card counting training.
What You Get
Guided Learning
- ✓ Phase 0: Basic Strategy
- ✓ Phase 1: Card Values
- ✓ Phase 2: Running Count
- ✓ Phase 3: True Count
- ✓ Phase 4: Bet Sizing
- ✓ Phase 5: Deviations
Training Drills
- ✓ True Count Conversion
- ✓ Speed Counting
- ✓ Deck Estimation
- ✓ Casino Simulation
- ✓ Progressive Difficulty
- ✓ Detailed Analytics
Ready to Start Training?
Download Protocol 21 free on iOS today. Master blackjack card counting with the #1 trainer app for iPhone and iPad.