Yeah, you're not getting it for free, however, I'm bored and I actually managed to find literally only one userscript on Speechify.
There's also some Speechify modded .apks (because of course there is).
I can't guarantee your device's safety after installing any of the APKs and that user script I link.
Not quite there, but usable: https://greasyfork.org/en/scripts/499210-speechify-premium-voices-helper
i recently came across speechify. i was wondering if any scripts were availiable ?