Google Chrome
To add Scrabble Solver to your Android device tap the menu button (three dots, usually at the top right of the screen):
Then click the download button seen in the middle here:
Or tap Add to Homescreen:
Scrabble Solver will then appear with your other Apps.
Samsung Internet
In Samsung Internet tap the download icon in the top right:
Then tap Install:
Alternatively tap the menu button in the bottom right:
Then tap
Then Install: