It just makes wallpapers

Literally this app just lets you make a wallpaper, slaps the current weather on it and you save that as an image to set as your lock screen wallpaper. The weather will only update if you go back into the app, create a current screen shot, then set that to the wallpaper. Useless.

Ari Maarie about Weather Lock Screen - Customize your Lock Screen Backgrounds with Weather Forecast, v2.0.1