Dark theme, light theme, or match your device

Switch the app's look in Settings, or let it follow your device automatically.

Go to Settings and pick your Theme:

Light: always light, whatever your phone is doing.
Dark: always dark.
Automatic: follows your device, so it flips with your system appearance and any schedule you have set.

The change applies straight away. Your subject colours stay exactly as you set them in both themes.

Did this not solve it? Contact us and include what you tried. In the app, Settings then Contact Support attaches the details that help us find your account.