5 Standout Apps Worth Downloading This Week

Evi for Android and iPhone

Evi is like the iPhone 4S for Android and other iPhone devices running iOS 4.0 or later. It does the same tricks, like showing you coffee shops nearby when you speak or type "coffee," or providing the traditional answer "42" when you ask it for the meaning of life. It's search with an artificial intelligence twist. On iPhone ($.99) or Android (free).

Airbnb for Android

The company that turns home accommodations into hotel rooms launched an Android app and a new mobile website last week. Both allow hosts and guests to instant message each other, browse listings and book listings. A "tonight" button shows places now for rent nearby. Free.

Smartr for iPhone

Smartr pulls all of the contact information you have in your phone, email and social networks into one place. It uses all three components to build complete profiles that include common contacts, message history and social updates. Also available for Android, the app launched for iPhone on Tuesday.

Groupshot for iPhone

It's standard practice to snap more than one shot while photographing a group. But the bigger the group, the less chance you have of catching everyone at a flattering moment. GroupShot hopes to fix this by letting you swap faces among similar photos. You simply color in the face you wish to replace using your finger and choose a face from a similar photo with which to replace it. It's like a simplified Photoshop function you can apply from your phone. $.99.

Formspring for Android

On Tuesday, the platform for asking and answering questions launched on Android for the first time. From the app, users can ask their friends or specific users questions, answer questions they have been asked and view their news feeds. It’s a screen-by-screen duplicate of the startup’s iPhone app, which it launched in September. Free