(CNN) -- Turning digital photos into physical keepsakes, or sharing them with less e-savvy friends and family, has always been something of a challenge.
But now a new app is letting users turn pics from one of the trendiest mobile photo tools into postcards for a small fee.
For 99 cents, users with an Instagram account can use Postagram to mail a postcard with one of their images. It lets users address, sign and add a message online (or from their phone); Postagram will then mail it to the intended recipient.
The card's design lets the recipient pop the photo out separately or leave it in the postcard.
Delivery in the United States takes 2-5 days, according to Postagram, and international delivery "a little longer."
As of Wednesday morning, the app was letting users send one postcard for free.
While there have been plenty of programs designed to turn digital images into prints (not to mention the old-fashioned color printer) Postagram hopes its card design and mailing service will set it apart.
Instagram's calling card is its set of funky filters that let users turn ordinary photos into colorful or vintage-looking images.
Postagram was created by Sincerely, a company newly formed by Matt Brezina, who co-created email app Xobni in a dorm room in 2006, and others. The company plans to release more digital photo tools.