1. Does the app crash once you open the software?
If so, make sure that you connect the POP to a power bank/supply (over 5V1A), rather than plug it into your phone directly;
2. If the app isn’t crash until you scanned around 400~500 frames, that means your phone is out of memory.
Under such a condition, you can make multiple scans. Here is the tutorial post: [Tips] What can you do when your phone is almost out of memory? - Multiple Scans
Not the above issues? Click “About” to report bugs, and then our developers will receive your log to analyze the problem.