I use an app called ReadEra which I like very much. I use the free version but it looks like the premium version does what you’re looking for: it can sync via Google drive and you can upload your own fonts. (Premium is a one-time $20 payment, not a subscription.)
I use an app called ReadEra which I like very much. I use the free version but it looks like the premium version does what you’re looking for: it can sync via Google drive and you can upload your own fonts. (Premium is a one-time $20 payment, not a subscription.)
https://readera.org/