it could be a device that we use explode ,, it might be the worst possible thing that can happen ,, and actually I was less understanding about this mining app ,, but what I know we need something to make in cooling
I'm not entirely sure what you mean by your post but yes the main problem is overheating as phones don't have fans.
If there was a shut-off point once the internal CPU reaches about 55 degrees Celsius then that might be helpful at reducing the risks. The exploding part is a bit uncontrollable though (unless you limit the phones use to not being on battery while the mining app is running - some phones now don't have a removable battery however).