I've made more zip purses as gifts as they are always useful. Earlier in the summer I made cut off denim shorts from some jeans I had "outgrown" for donating to the Greyhound Rescue Wales charity shop where I volunteer and I didn't want to waste the "legs" so used some for my purses.
Have to admit the stretch denim was not at all liked by my sewing machine but making sure the stretch was across the purse and not top to bottom worked a bit better. Love the ladybird braid I ordered on Etsy as while ago and this ladybird stripe fabric I've had for years and years was just perfect for the lining.
I don't have a smartphone but have made my purses to fit them. They are also the right size for pocket digital cameras. I've a smaller purse that fits my phone and I clip it to the inside of my handbag so that I can grab my phone quickly without emptying everything out onto the floor to find it at the bottom.