Have you ever sent a photo to a friend you later wished you could erase? Maybe you had your eyes closed, or you noticed a stray nose hair upon second glance.

Snapchat, an iPhone photo-messaging app, lets you do just that. And as of today, it's available for Android users as well.

The concept's simple: Users can take a photo with their phone, add text if they choose to, then set a duration -- between one and 10 seconds -- and send it to a friend. Once the recipient opens the photo, it's deleted from both phones after the allotted time.

"It really empowers expressive and frequent content," Evan Spiegel, Snapchat's founder, tells Mashable. "With social media there's a lot of s…
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