Yes, you can use apps to help you learn Blackjack strategy. These apps typically provide tools like basic strategy charts, which show the optimal way to play every hand based on your total and the dealer's upcard. Many apps also have practice modes, where you can play against a virtual dealer, allowing you to apply the strategy in real game scenarios. Some apps even offer strategy trainers that test your knowledge and decision-making, providing feedback to help you improve. For more advanced players, there are apps that help practice card counting, although keep in mind that this technique is often discouraged or banned in casinos. You can find several of these apps in your device's app store or use browser-based trainers to further refine your skills.