Google has already enabled dark mode for Google Voice on Android phones in October 2019, and now Google Voice finally rolled out a dark mode for iOS users. The latest version of Google Voice (ver. 20.36) will automatically enable the dark or light mode as per the iOS settings preferences.
The dark mode is a popular feature on today’s phones, it will help and create a better viewing experience in low-light conditions and preserves battery life. By the way, when you enable a battery saver, it will automatically set to dark mode.
To enable dark mode in the Google Voice app, go to Menu > Settings > Display Options > Theme > and here you can select dark or light mode as per your choice.