When developing mobile hybrid apps, having great emulators is important, but at some point, you have to test in the devices. Also, its well known that if you want to test on iOS devices, you need to have a Mac machine with XCode.
That's why, besides my Linux machine (where I do most of my work) I decided to invest what I've earned in my projects on a Mac mini and an iPhone, where now I can physically test my apps.
I also have several Android devices (as old as version 2.3) and newer Android 4 phones and tablets.
So when you hire my services, you don't have to worry about the equipment, I have it covered.