Is there a single word to express the idea of "remove from existence" [closed]
expunge
erase or remove completely (something unwanted or unpleasant) : the communists had expunged references to the Hitler-Stalin pact.
'Obliterate' could be the word you are looking for. But I don't know if you think its suitable for the name of an app..!! 'Annul' also means the same to some extent. You could modify these words to come up with a suitable name.