IOS or Android?

Both are great for different purposes

I personally prefer iOS but many of my colleagues use Android. Our upcoming app RECRD is available in both iOS and Android and I never noticed the difference in features until recently. Both are good in their own way so it's depends on one's personal preference.

Nowadays I prefer IOS with mostly everything, but they are great on different reasons so I really cant say no to Android too

Since Windows phone became obsolete, I decided to use IOS since it offers better fluidity of workflow from one device to another (saying its also an apple product)

If i can choose both of it, why not?

There is no and will not be a definite right option, you know, still each person something will be more convenient different, if you like to fully customize your phone, then there is clearly Android, otherwise the iPhone looks much better, and we live with the Internet, just go to the comparison site https://rankquality.com/en/ , and there already on each point to compare them, as I did