There are similar apps. You missing the point that good apps just don't work in silo. Yes, you can have the most super duper app but without proper integration to os is like a Frankenstein solution. E.g. click a link to send a email in iPhone, the default email is used not your super fantastic email app.
Plus a phone is more of a personal than a work device. If you want to create media/content you use a PC/Mac/tablet.
Automation is one area iPhone is lacking. You want to sync or upload photo/files in iOS, you have to sit there with app opened and wait for task to complete. Or why do you always need to silent your phone manually in iPhone. On Android I can have apps to take care of these mundane tasks for me automatically (based on rules/scenarios)
We use our device for communication. There is no apps on iPhone that can do call management like blacklist/call recording/rules filtering.
There are just too many areas and tasks that iPhone just can't do. Granted that some apps are more polished on iPhone but thats about it. These polished apps cannot leverage or integrate with the underlying os (or other 3rd party apps) to give a much greater capabilities and offer more complete workflow experience.