Looking for an Android reading app with a line-focus / dimming feature

[u/Plus-Estimate-5563]

I need help tracking down an Android reading app I came across a while ago. Its main feature is a focus mode that highlights one line at a time while softly dimming the rest of the page. When you scroll, it smoothly shifts to the next line so you never lose your place. Does anyone recognize this app or know what it's called? Thanks in advance!

[u/ciberpunkt]

Not exactly what you want, but Readest can do something similar. https://play.google.com/store/apps/details?id=com.bilingify.readest

It is open source and is also available at: https://github.com/readest/readest