To install LightSail directly on an Android tablet without using the Google Play Store:
– Tap the DOWNLOAD link
– Tap OK on the popup that says “This type of file can harm your device”
– The download will begin
– When the download is finished, navigate to the Settings on your Android device and tap Security
– Under Device Administration turn Unknown Sources ON
– Navigate to the Downloads folder and tap “app-prod-release.apk” and follow the on-screen instructions to install