Google Wear Theater mode is offering you this:
When enabled, the screen is OFF, you can't see anything at all.
If you want to have a look at incoming notifications you have to turn the screen on and the luminosity is then far too high.
SWApp True Dark lets you darken your watch screen as much as you want it !
You will still be able to see your clock face and incoming notifications but with such a low luminosity that you won't bother other People !
SWApp True Dark will allow you to put your watch on his dock at night while emitting far less light then usual even with luminosity put at its minimum, letting you see the time but without being disturbed by the light.
Dark mode can be auto enabled when the watch is on his dock (you can enable this feature during a certain period only, at night for example).
Lower luminosity other benefits :
1. lower battery usage
2. lower risk of Burn-In on Oled Screens
You can enable a side swipe area from any side of the watch to toggle on/off the application.
The watch luminosity can be set on remotely from your phone or on your watch.
See included real life photos
they are all taken at 1/15s, f6.3, iso 12800 on a LG Watch R
Left Column is with SWApp True Dark Disabled with Watch luminosity set at minimum
Right Column is with SWApp True Dark Enabled