Sometimes, an Android app you want to install is not available in the Google Play Store. This can happen for a number of reasons: perhaps it's geo-blocked, it could contain adult content, or the developer might have removed it.
But even when an app is not available through the usual channels, you still have ways to install it on your device. You need to get a copy of the APK file so you can sideload it.
Several sites specialize in offering APK files for download. Some are better than others, so keep reading if you want to discover the best sites for downloading APKs safely.
Because the APK files install apps on your system, they can pose a serious security threat. A person will malicious intentions could modify the APK before you install it, then use it as a digital Trojan horse to install and run malware.
Thus, you need to ensure that the site you use is reliable. It should thoroughly vet all APKs and have a history of security and reliability.