Frequently asked questions

Usually because of optimization features on the eReader device.

On Onyx Boox readers, for example, there is a feature called 'Embolden Webpage Text' that defaults to true on all apps, which will affect JetReader, since it uses a web browser component to render books. To disable this feature, long press the app icon, select 'Optimize', pick the 'Color' tab, tap the little pencil icon at the bottom, corresponding to 'Other Color', then disable 'Embolden Webpage Text'.

On other devices, there may be similar settings (if you figure something out, please let me know, so that I can add it here). If you are unable to solve the issue using system settings, you can alternatively force JetReader to always override the font-weight by going to Settings => Reading experience => Font and book styles, and setting 'Font weight' to for example 'Normal'