Androids are more customizable, have less restrictions and have huge community backing.
For example, my Oneplus3T is a year old, but it still has community support. I've flashed ROMs (Custom OS) and I'm able to download whatever app I want for free (The power of googling APKs @Sneaky ). I can change my ringtone, have a way more wide variety of apps, etc.
The only thing that's good about Iphones is their ability to see if your message was delivered and read in the SMS app, other than it, it's an overpriced glorified shit that becomes obsolete within a year.
iOS is really nice for people who just want a simple OS that just works, my mom learned it faster than Android but tech savvy people will not really like iOS in terms of customization and freedom, there is a huge community creating custom ROMs for Android which is really nice. There is so much shit you have to do when you just want a simple custom ringtone, iTunes is cancer. If you ever need to import music or ringtones use CopyTrans, so much easier to use.
there are different ways depends on your iTunes version, check up on youtube. I used to have iPhone 5 (IOS) but fuck apple,I moved to Galaxy S8+ (Android)