Everything can work; nothing is perfect. In general, you can leap at every possible opportunity and expect a lot of disappointments, or you can be very picky and miss a lot of opportunities. Or anything in between. You have to set the balance somewhere where it won’t burn you out in a week, and go from there.
Whatever apps the OP’s son uses, it makes sense to put some serious effort into crafting a profile that’s attractive to the sort of women he wants to attract, and that signals what he’s looking for.