ApkTrack is described as 'simple Android application which periodically checks if your installed apps can be updated' and is an app in the OS & Utilities category. There are more than 25 alternatives to ApkTrack for a variety of platforms, including Android, Online / Web-based, Android Tablet, Android Wear and F-Droid. The best alternative is F-Droid, which is both free and Open Source. Other great apps like ApkTrack are Aurora Store (Free, Open Source), Google Play Store (Free), Aptoide (Free) and APKPure (Free).
Aurora Store is an unofficial, FOSS client to Google's Play Store with an elegant design. Not only does Aurora Store download, update, and search for apps like the Play Store, it also empowers the user with new features.
Aptoide is a distributed marketplace for mobile applications which runs on the Android operating system. In Aptoide, unlike the default Google Play Store, there is not a unique and centralized store but each user manages their own store.
The project's aim is to promote free and open source software on the Android platform. Fossdroid takes its data from F-Droid, but organizes apps in an attractive, Google Play-like arrangement with the ability to view apps by popularity.
APKUpdater is a tool that simplifies the process of finding updates for your installed apps. It will provide functionality similar to an app store without having to install the associated spyware that comes with it.