Re: So Someone Learn me....
Profit come from the lock-in. Very few free apps on iOS, and apple get a tasty cut of the sale price. They get repeat purchases and their cut for the buy again tablet version of the same app. Android is a million miles away, for every pay app, there is usually a free one, often as good, or better, its pretty rare if you buy an app, you will be stitched into buying again for tablet. (Its possible to have two versions and lock out phones and tablets, but its not user friendly and likely to result in you being a 1 star review hero)