And to answer your question about why dropping issue is connected with ios versions. For example, if I want to go back with one hand, I have to stretch to touch the back button or swipe from the left end to right. It?s OK with 5s but not with 6 or plus. I have to adjust my grip to do those actions, which increase the dropping probability. With two hands everything is fine but we can?t avoid one hand using situations.
So if iOS makes some changes for these situations such as: an intensive swipe of short distance in the middle of the screen and you can go back. Much more convenient and safer, right? But before that happens, I think I will use Halo Back which I mentioned above.
What do you think? Hope it makes sense.