Installing an app is no problem, and I was using a calendar app that worked okay. But I was unable to find an email app that I liked and all the password manager apps worked (or work) by (ab)using an accessibility feature that had a pretty severe impact on the performance of my phone.
And uninstalling an app is impossible on stock Android, if that app is made by Google.To achieve that I had to unlock the boot loader of my phone, for which there was no official method.
Meanwhile on iOS I can use the default mail and calendar apps that work fine and my password manager integrates perfectly with the os, while I don't need to use iCloud at all if I don't want to.
Those 3 apps weren't the only reason to switch from os, but they did make the choice for, and switching to, iOS a lot easier.
