[FAQ] Why does the night mode not work on my device?

It is mainly caused by an old version of "Android System WebView" if your device is Android 5, 6 or 10.
Reasily uses it to display epub content. So you have to keep it updated in Google Play Store.
If your device is Android 7, 8 or 9, please update the Google Chrome app.
If the night mode still not works, please mail me the epub file with a screenshot, so I can find out the cause of the problem.