AFAIK sadly Heroku does not provide some other _free_ permanent redirect option for their *.herokuapp.com sub-domains without actually running a dyno there.
Thank you so much for google-webfonts-helper! It's been helping me a lot recently ever since there was this questionable court decision in Germany that using fonts directly from Google violates the privacy regulation and website owners were sued all over the place.
You havent by any chance been sued by some weird lawyer from a german capital whose name pops up all over google on researching this in the name of a person that does not really seem to exist?
They are fraudulently trying to trick people in paying ~170 euro without any clear statement on what is their claim. Dont fall for it.
That's good to hear, I was thinking about whether google fonts helper would survive this. Awesome project by the way, I've used it a lot, thanks for making it!