If software developers are free to distribute outside of controlled app stores, free from any external vetting, we'd see the exact same predatory behaviour we see in the broader software industry. Hard-to-cancel subscriptions and misleading free trial scams would be two big examples. Dating app publishers haven't made any secret of their predatory desire to make mobile subscription cancellations more difficult, to extract greater revenue from users, for example [0]

However, the "attack surface" would be much bigger, given that consumers spend far more time on their smartphones than on PCs.

0: https://nypost.com/2019/11/06/tinder-owners-stock-tumbles-af...