> as long as they're upfront about the ads/cost when I purchase the app They don't mention the ads explicitly on the app page, but the app (with ads) is free,

> as long as they're upfront about the ads/cost when I purchase the app They don't mention the ads explicitly on the app page, but the app (with ads) is free, and you can see a list of top in-app purchases which clearly list "Remove Ads" alongside the associated price.