If your cat never leaves you alone, download Friskies Cat Fishing for Android and manage to keep him busy for a while he plays at hunting fish on your phone.
The ideal app for your cat to leave you in "fish and quiet".
Only recommended for people that don't appreciate their phone
Your smartphone will probably end up badly damaged with this application. In the best scenario, your cat will decorate the screen with a few scratches while it tries to catch as many fish as possible. It's advisable to place the mobile device on a flat surface if you don't want your cat to destroy it.
You probably thin fishing is boring, but not your cat, who'll have a great time chasing fish all over the screen in Friskies Cat Fishing for Android.