A. 1. Disable the motion blur feature temporarily while editing to see if it improves performance. You can do this in the app settings. 2. If you need to use motion blur, try applying it to shorter clips rather than longer ones to minimize lag.

B. 3. Clear the app's cache if possible. Go to Settings > General > iPhone Storage, find Time Cut, and see if there is an option to offload the app, which can help clear temporary files.