on the face of it vs apparently

on the face of it and apparently both are adverbs.

Word	Noun	Adjective	Verb	Adverb
on the face of it	No	No	No	Yes
apparently	No	No	No	Yes

As adverbs, on the face of it and apparently are synonyms defined as:

Other synonyms of on the face of it include ostensibly, seemingly.

on the face of it (adverb)	apparently (adverb)
from appearances alone	from appearances alone
	unmistakably (`plain' is often used informally for `plainly')