When you want to find a restaurant, a bar or nail salon on-the-go, you probably turn to Yelp's iPhone app. But for local arts and entertainment  knowledge, the going's not so easy. That's why we're delighted to learn that a new SF Arts Guide iPhone & iPad app is stepping in to fill the void, featuring a database of over 1,200 local events each month.

Developed by DVPWeb and with support from the Grants for the Arts and the Wallace Foundation, the app lets you bookmark, map and share events with your friends. And if you need a quick plan-on-the-fly, it'll tell you all the cool stuff happening that day right away. Oh, and it's free. Try it out and let us know what you think.