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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for App source 6 letters:

ITUNES: App source
ITUNES: Apple app source
ACLU: Mobile Justice app source
ADS: App revenue sources
ADS: Revenue sources for freemium apps
POPUPAD: Revenue source in many a free app
USER: Possible source of feedback on an app