App Marketing Agency: Do you really need one? Although app developers always have the option to hire an App Marketing Agency or a PR Agency, most decide launch the apps themselves to cut back on marketing costs. Check out 5 secrets on how to get your app featured. in Public bookmarkswith app_marketing_agency Note: Although app developers always have the option to hire an App Marketing Agency or a PR Agency, most decide launch the apps themselves to cut back on marketing costs. Check out 5 secrets on how to get your app featured.