Just curious…
1. This graphics app, does it have a save function? Or are you in the habit of not saving things after a series of minor changes or one major change?
2. Why are you using a phone and not a computer to do graphic design?
Your answer to number 2 will probably be something along the lines of "I'm with a customer, only device I had, a laptop is too heavy to carry around", etc.
No offense, but if that is one of your answers I don't consider that much more than an excuse.
However, I sit in front of a MacPro with three screens, four other computers and my laptop all day doing graphic design for a small newspaper. So what do I know.