About Uptodown App Store 6.77
From version 3.39:

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This is Uptodown's official app, designed specifically for Android. Now users can directly download apps in APK format, quick and safe. Plus, you'll get automatic updates as well as the option to rollback to any previous version.

Uptodown is a totally open app marketplace, without any regional locks or country-specific restrictions. Plus, you don't need to go through any sign up proces