Na XDA jest opis jak to zrobić, np. dla aplikacji które są niedostępne do zainstalowania dla telefonów innych niż Samsung.
Instruction how to install .wgt files (for example smimming apps from this theme):
0) Turn off the bluetooth on your watches. Also turn off the WI-FI on your smartphone to break all the connections between watches and the smarthone.
1) Download this file: goo.gl/GMuoWj
2) Create a folder on your computer in the root of disk C: with name "tools" and unpack the downloaded file.
3) Download the .wgt file with application (or with a clock face) and place it in the folder c:\tools\
4) Turn off and switch them on again, switch on the Wi-Fi on watches and connect to the same Wi-Fi which your PC is connected to. Then go to the Wi-Fi info on watches and remember the IP-adress of the net. After that activate the mode for debugging on your watches.
5) Now on your computer press Win+R buttons, in the opened window paste this "cmd" and press Enter.
6) You will see a black window. Paste this "cd c:\tools" and press Enter. Then paste this "sdb.exe" and press Enter again and wait a little bit.
7) Then copy this "sdb connect 192.168.1.6", where 192.168.1.6 is the IP, that you have rememberes from the point 4. Do not hurry to press Enter! First of all you need to keep the screen of your watches to be switched on! Then press Enter and you will see the debugging request on your watches, that you need to accept.
8) If everything is all right in the black window you will see
"соnnecting to 192.168.1.4:26101 ...
connected to 192.168.1.4:26101"
If not, than switch off the firewall.
9) Paste this "C:\tools\sdb install xxx.wgt", where xxx is the name of file with wgt extention that you have put into c:\tools\ directory in the point 3. Press Enter, wait a little bit...
10) Success!