You may have to download an Android APK file if the current version of your app can’t be updated from the Google Play Store. Of course, this includes older versions of Android that no longer support updates to the Play Store.
In addition, you may also have to download the APK version of any app that may require sources other than the Play Store. Therefore, you need to enable settings to install apps from unknown sources.
Simply visit Settings > Security > Unknown Sources and tap the switch to turn it on. This will enable you to install APK files not from its regular repository. However, you need to be mindful of this setting because it can trigger the installation of malware from compromised websites during the download process.
Thus, you must disable this setting after successfully installing the APK file you intended to have. But, first, you have to acquire the APK file from a trusted site. You can use your computer or your mobile Android device to download the file. Just enter the name of the app you would want to download. You also need to consider downloading the latest version.
After downloading the app, you can now move it to your Android device via the SD card. But, you need to send the file from the computer to your smartphone. You may also have to use the USB cable of your phone to connect your phone.
Once the file has been transferred to your mobile device, disconnect the cable. Find the APK file you have moved to your memory card and install it to your Android mobile device. Installing the latest version of the Play Store should make your device more secured against threats. However, it is always safe to wait for the official version of the app than to experiment on any APK file you can download on the Internet.