A lock screen app has water droplet effect, exactly the same as S6 and S7.
Also you can set camera or call shortcut to access camera or call easily, setup your personal text.

NOTICE:
1. This is a theme of X Locker, you need to install X Locker first and apply this theme.
2. This theme is only compatible with 64-bits phones and requires android 5.0 or above, otherwise there's no water droplet effect.

PS:
1. Click settings icon on right of tool bar to enter theme settings.
2. Launch X Locker, you can change wallpaper, setup security lock, and more.