If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
If you select from the fonts available within the sitebuilder they should show across all browsers, consistently.
If you are using a non-web custom font that you have installed on your PC but may not be installed on other devices, then you will see a difference on the other devices.
You can install most fonts, if not available within the sitebuilder library, by a special process. Google Fonts is a good repository of many uncommon fonts and allows fairly easy implementation for your website. There are a number of other web-font providers that can be found on a web-search.
I don't know specifically how you have set up your font selection so that is why I have outlined a general explanation.