APKSpree is described as 'top Android Repo for Android Researchers and Android enthusiasts. With 5k Android apps in it's repo and increasing day by day, APKSpree is best android repo. All the Android apps can be verified by MD5 Hash' and is an website in the Online Services category. There are more than 10 alternatives to APKSpree, not only websites but also apps for a variety of platforms, including Android, Android Tablet, Kindle Fire and SaaS. The best alternative is F-Droid, which is both free and Open Source. Other great sites and apps similar to APKSpree are Google Play Store (Free), Aptoide (Free, Open Source), APKPure (Free) and APKMirror (Free).
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.
In an effort to make things easy, and maybe even fun, AndroidPolice.com created APK Mirror. Over the past several months, they've been working to build a smooth, reliable, trust-worthy site to host the downloads users love. You also can upload APKs to the site yourself.