Here's a good free Euchre game for your phone or tablet, Android or Mac. Has a good game interface and lots of options to customize the game play and skill level to suit your need.

You can join online games, but I only use it with computer opponents. Good for learning or killing time! Can find it in your phone's 'app store'.

http://karmangames.com/euchre.html

Euchre

You can play euchre with computers or online with other people

Game's features:
- Advanced computers
- Most popular rules variations
- Ratings and leaderboard
- Detailed statistics