I have been an Android user for 13 years now. After using almost every Google service possible I am going down the privacy rabbit hole lately. Gmail -> Proton Mail, Chrome -> Firefox, Keep -> Notesnook, Google Search -> Kagi, …
I am currently using a Galaxy S23 with as few Google apps as possible (and focussing mainly on open-source apps). I am familiar with rooting (I was a CyanogenMod user back in the days), but today I want to use the phone without tinkering and problem solving. I also like to use a smartwatch and banking apps, so GrapheneOS is a no-go unfortunately.
So it is “Stock” Android (or Samsung’s Android ) vs. iOS for me. Is it better (in terms of privacy) to use an iPhone or stick with an Android phone with an system wide ad-/tracking Blocker (I use Adguard)? It seems there are more privacy-friendly/open-source apps on Android.
Graphene OS > iOS > Stock Android
If it’s Stock vs iOS, do you really care about privacy? Google is a data mining ad company, that’s why their stuff is free. “If you’re no paying for the product, you are the product”. So Apple right? LOL no. Paying is no protection against being sold too. It’s closed, you’re never know, so they might as well make more money from you.
The only way is having any confidence in things is open source.
So I don’t think iOS vs Stock matters. Android is more open, but all those root level closed Google services completely compromise the phone. They owned the phone.
Stock IOS is probably more privacy friendly than android. Googles entire business is to make money off your data. Stock android uses google play services that have access to pretty much everything on your phone. Apple will bend to politicians on scanning your files and shit, but at least they (probably) aren’t selling your data. As much as google at the very least.
But like many comments here, if you actually care about privacy, stock anything isn’t the way to go. I use calyxos and find it to be a good balance between privacy and usability. No android auto, but banking apps work and from what I’ve read you can use garmin smartwatches or other similar watches that use their own app and smart watches that have been added to gadgetbridge https://f-droid.org/packages/nodomain.freeyourgadget.gadgetbridge/
Some people don’t like microg, but I believe you can use calyxos without it. (Not sure if that will break banking apps though).
iOS is fully proprietary, so while some might argue that it is more private, it is almost impossible to know. What we do know is that it isn’t private, and apple has a track record against privacy.
I think comparing the two platforms from a privacy perspective is pointless. You’re not going to be private either way. Might as well focus on other factors.
Ironically the Pixels are the easiest to de-Google.
Apple wants your data as well