Most of this smartphone apps in this list are owned by Google, Facebook, Apple or Amazon; all of these apps are free to download. … List of most popular smartphone apps. RankNameOwner1FacebookMeta Platforms2Facebook MessengerMeta Platforms3WhatsAppMeta Platforms4InstagramMeta PlatformsList of most popular smartphone apps – Wikipedia en.wikipedia.org › wiki › List_of_most_popular_smartphone_apps