So the author mentioned is sunilpaulmathew, but it is actively maintained by a different user.
sunilpaulmathew has a repository here sunilpaulmathew (sp) · GitHub but I do not see the app there.
But it appears to come from this repository “apk editor” and maintained by “apk editor”, that is listed as not being very responsive. The rest of the contributors really haven’t done much.
Is this practice common?
I do not know much about foss apps, I was just looking it over before downloading it as I’m unfamiliar.