I selected that option in Cake wallet and it seems like the wallet has to download a lot of data to make the whole thing operational. From what I can see, it's quite slow and stops when the screen turns off, so it's not as simple as it seems at first glance.
Yeah it was taking a lot of times. I kept waiting and waiting but the count wasn't moving much. Who knows, how many minutes, hours or days it would take to scan all those blocks. I got bored and had other things to do, so I just turned it off. So, I agree with u here, not as simple as it looks.
