Most note taking apps use a san-serif font because I think people generally prefer that for notes, so I think it should probably be default, but I'd be just as happy if there were a toggle for it.

Also:

• I'd prefer if by default it didn't load any external resources - e.g. I'd prefer it used my system default fonts rather than externally-hosted Google Fonts.
• It's not possible to hide the credit button - opening settings it shows the switch in the off position, but the pink button still shows. I tried toggling it on and off again.
• Personally I think the credit should be in the settings, not taking up the nice minimalism of the page.
• I think by default it should use the system dark mode - i.e. let isDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches;

Anyway, thanks for making this open source! ❤️