build a simple application that could be sold on the Google play store as an ever changing background or screen lock. I have over 700 hand drawn trains, engines and landscapes that match their exact engines, cars in their respective locations around the world. they're copyrighted and patented and this is what I'd like to do next. It would be a simple wallpaper (not a live wallpaper) but more like a slideshow. Possibly on the lock screen only or with a choice to turn either on and off. So basically Android is already setup to do that part of it when you choose to use it as a wall paper. I just don't know how to impliment it into Google play store and give some as a basic free app with small banner ads, OR paid version the user could choose a specific group or pick random singles to show for like a half hour each.
13 freelancers are bidding on average $531 for this job
I am a professional mobile developer. I would like to work on your project. But first we need to talk. Ping me, I will contact you and sort out a solution for the project.