You can see all the apps you've ever downloaded on your Android phone by opening the "My apps & games" section in your Google Play Store.

Android is, for the most part, an open platform. You can use the Google Play Store to install apps and games, or you can go off the reservation and install APKs on ...

Even if you get the Play Store installed, you’ll need Google Play Services working properly for most apps to function correctly. This behind-the-scenes toolkit handles logins, notifications, location ...