Only have 4? You can still play duplicate! Dup Bridge is a duplicate bridge hand dealer and scorer.
Play duplicate at home!
Dup Bridge tells you where to deal each card, and compares your results with a database of accurate, human-played boards.
This app requires free-to-print card labels, available here:
http://www.dup-app.com/print-and-play/
You can also purchase a deck of card with clearly printed labels here:
http://www.dup-app.com/new-products/