"With the revamped Fit last year, Google focused on physical activity through Heart Points and Move Minutes. The service is adding detailed sleep logging to capture your entire day, while the dark theme is now official," the 9to5Google recently reported.
Google Fit swaps out the bright background for a dark shade of grey, with the blue Move Minute and mint green Heart Point rings appropriately themed.
Meanwhile, Sleep sports purple colour accents whereas the bottom bar retain its slight transparency.
Google Fit for iOS devices, which were launched in April, can now include a map of users' workout, the report added.