If you type your question on google (with 'for fitbit'), it is the first result...
If you type 'font-family' in the search field in thethe dev.fitbit.com site, it is the first result...
Anyway, all the fonts are listed here : https://dev.fitbit.com/build/guides/user-interface/css/#fonts
If you type your question on google (with 'for fitbit'), it is the first result...
If you type 'font-family' in the search field in thethe dev.fitbit.com site, it is the first result...
Anyway, all the fonts are listed here : https://dev.fitbit.com/build/guides/user-interface/css/#fonts
To anyone reading this now, you might have noticed the page linked above by @gregoire no longer displays any font-family options besides the system defaults (which imo is a real shame - why would the documentation lack something so important!). You can still find them here, thanks to the Wayback Machine:
https://web.archive.org/web/20191102091359/https://dev.fitbit.com/build/guides/user-interface/css/
If you are using the fonts listed in the old documentation found on the Wayback Machine, be very careful. Going forward, Fitbit is supposedly not supporting any fonts other than the System font names. For API 4.2, the system font actually references Seville. For 5.0, the system font references Raiju. Other custom fonts are not supported, and developers are expected to use letter images instead. So, if you are developing anything new, you're better off sticking to the system fonts only.