The first thing you want to think about is your product iteration. If you have a crappy app, you will be throwing your money away with any ad budgets you have.

The first thing you want to think about is your product iteration. If you have a crappy app, you will be throwing your money away with any ad budgets you have. If you don't know ASO that well, I would suggest going with someone like Mobile Action. (I don't know the other two, but if they are the same, they are worth taking a look at).