Comment by msravi

The worst I've had is a clock/weather widget that seemed to give you a choice of ads/no-ads, but if no-ads were chosen, it would make your phone part of a network of proxies (oxylabs) without telling you, in addition to transmitting location info (which it told you about). No payment option to get rid of ads/data selling. Only way I found out was by looking at requests it made using netguard.