The Android app is good but does quite often fail to open, just getting stuck on the splash screen indefinitely. Means I have to have another app for viewing photos on my phone.
One of the main reasons I wanted to install it is because my partner runs out of space on her iPhone and I don't want to pay Apple exorbitant amounts for piffling storage. Unfortunately it doesn't quite work for that; I can't find an option to delete local copies after upload.