A. 1. Update the app: Ensure you have the latest version of MyCardWallet installed, as updates often fix stability issues. 2. Free up storage space: Go to Settings > General > iPhone Storage and check if you have enough free space. If storage is low, delete unused apps or files to improve performance.

B. 3. Reset settings: Go to Settings > General > Reset > Reset All Settings. This will not delete your data but will reset system settings, which may resolve crashing issues.