I made about $500 with a wallpaper for kids (https://play.google.com/store/apps/details?id=com.jafj.sparksteddytrial https://play.google.com/store/apps/details?

I made about $500 with a wallpaper for kids (https://play.google.com/store/apps/details?id=com.jafj.sparksteddytrial https://play.google.com/store/apps/details?id=com.jafj.spark...) and $3500 with a wallpaper for World of Warcraft enthusiasts. This last one was removed by Google/Blizzard because copyright infringement when it was making around $300/month.