This is the best smart watch application if you have Always on Display | Super Amoled - Edge Lighting you don’t need for smart watch. Always on display clock is made possible thankfully by amoled.  To save battery real time clock wallpaper stays your phone screen black except for a few pixels to show digital clock on screen. 
The application also have a night clock view. have Always on Display | Super Amoled - Edge Lighting live device time with date on mobile screen with always On Amoled. Display picture clock calendar clock edge clock edge lighting and picture clock with stickers. 
It is a new cool way to maximize your screen on time by setting up the black background on your AMOLED home screen. What's going on your phone simply take your mobile out of your pocket just turn your face at mobile screen and enjoy all these feature of Samsung Galaxy S7 Galaxy S7 edge Galaxy S8 Galaxy S9 and Galaxy S9 plus.
How to use: 
1--- Open this app and start service by clicking on toogle button.
2--- Select clock type you want to show on your screen.
3---You can also select your picture clock.
4---Add memo text to always display on screen.
5---Easily change text and clock color.
6---Click apply….

Edge Lighting
Color effects will run around your screen when incoming calls or new notification arrive Popup alerts.
How to use: 
Open this app and start service by clicking on toggle button.
Select clock type you want to show on your screen.
You can also select your Digital or Analog clock.
Add memo text to always display on screen.
Easily change text and clock color.
If you want edge light alert start edge lighting services also change edge light colors.
Click apply….
Always on Display | Super Amoled - Edge Lighting Features 
Display time and date information on black screen wallpaper.
Display battery level.
Display notification.
Always on Display Digital clock
Notification enable and disable.
Analog and digital both clock supported.
Best collection of stylish and smart watch.
Change text color and style.
Change clock color. 
Best clock design for both analog and digital.
Handle display during call.
Amazing music controller 
Add memo text always display on screen.
Very easy to use.
All clock are free to download.