Searching is very cumbersome!

Needs a way to EASILY search artist alphabetically. No alphabet on screen, just have to search and hope you spelled the name of the artist right or scroll forever. Can search by painting name, but come on, get serious, how many people know the exact name of the painting they want to see?

One more thing, the app "hangs" very often and has to be shut down and restarted

Wdav about National Gallery, London HD