Regarding privacy on iOS, I recommend watching [this video] (https://www.youtube.com/watch?v=JHnBOUNxHsw). You can get more privacy on Android with some tweaking (custom ROMs, AdAway, uninstalling pre-installed bloatware, etc...). There are several ways to get more privacy, some easier than others. I know most people won't even try. On the other hand, with iOS, you're handing your privacy over to Apple in good faith, but you have far fewer options to take things into your own hands. People want privacy out of the box, but that often clashes with companies' interest in making as much money as possible (simply put). Some companies use privacy as a selling point in their marketing campaign, but often it is just false advertising.