This app was mentioned in 9 comments, with an average of 1.33 upvotes
Device Info Live wallpaper, it's a live wallpaper for your Android device that gives current running info of your device.
https://play.google.com/store/apps/details?id=jp.main.kurousa.android.livewallpaper.DeviceInfo
My mobile wallpaper: https://play.google.com/store/apps/details?id=jp.main.kurousa.android.livewallpaper.DeviceInfo&hl=en_US
My degenerate desktop wallpaper (Source is Nurse Love Addiction): https://imgur.com/3xinK0Y
DeviceInfo live wallpaper. I'm a geek, so it shows me important stuff like CPU and RAM usage, internal temperature, date/time, battery level, and tons more information about my phone.
DeviceInfo Live Wallpaper.