F-Droid - F-Droid is an interesting alternative for Android users who want to try something different and not have to use the Goole Play store all the time.
AppLovin - AppLovin is a comprehensive mobile marketing platform that connects you with your ideal users around the world.
Aptoide - Aptoide is a third party replacement for the traditional Google Play Store.
AdMob - Earn more from your mobile apps using in-app ads to generate revenue, gain actionable insights, and grow your app with easy-to-use tools.
APK Pure - Download apk for Android with APKPure APK downloader. NoAds, Faster apk downloads and apk file update speed. Best of all, it's free
MobFox - MobFox is a mobile advertising platform.