As nouns the difference between appendage and app
is that appendage is an external body part that projects from the body while App is abbreviation of lang=en.
As an initialism APP is
actinobacllus pleuropneumoniae.
appendage
English
Noun
(
en noun)
an external body part that projects from the body
a natural prolongation or projection from a part of any organism
a part that is joined to something larger
Synonyms
* extremity, member
* outgrowth, process