IMPORTANT:
Works only in conjunction with WATCHMAKER PREMIUM

Nothing easier than that.

Please install WATCHMAKER-Premium first:

http://goo.gl/FMxUfY

Then install Digital Watch Face App.
For Watchmaker, the watch then appears under "My Watches".

Just change the color by tapping on the right edge
-Digital clock
- Date and day
- Battery indicator of watch and smartphone
- Weather button for currently temperature and weather condition. Maximum and minimum daily temperature. 4 days preview.
Time of sunrise and sunset.
- Stopwatch button
- Step counter button
- Samsung Health Button
- Alarm button
- Flashlight Button
- Change from 24h to 12h am / pm by simply tapping the time

If you are not sure how it works, try a simple free watch first.
https://play.google.com/store/apps/details?id=fred.wmwatch.Gold2
Or get the 10 Watch Super sparpaket.
https://play.google.com/store/apps/details?id=watchface.watchmaker.watchpack