Seems like a pretty useless app to me. Texting from my PC? My desktop is at home, & (unless it's plugged in for charging) my phone is right with me (on the desk, in my pocket, etc.). My laptop is either a) plugged into the TV set at home, or b) I have it with me when I'm away from the house, & I always have the phone with me. So the whole "text from your PC with your phone account" is 100% useless.
As for accessing my photos...I can always look at the photos on my phone (see above about how far away the phone is going to be from the PCs), or I can use the existing Photos App in Windows 10 to download any, some, or all photos from my phone just via USB (which works 100% with my iPhone 6).