Sincerely Ink Cards lets you send 5x7-inch cards with a glossy finish for $1.99 each, including shipping. The app offers lots of themes to choose from and lets you add your own photo and a personal message. Delivery can take three to seven days. (Sincerely.com)
Apple's Cards app lets you create traditional-sized quality greeting cards, which cost $2.99 to $4.99 each. (Apple.com)
Great if you're on a budget ... or obsessed with the Instagram app. Postagram lets you turn any photo from your camera roll into a glossy postcard, but what's really neat is that the recipient can pop the photo out to frame it. It's $.99 to send one Postagram, but less if you're sending in bulk. (Postagram.com)
Red Stamp offers more variety when it comes to pricing and themes. Depending on the design, card prices range from $.49 to $1.99, and you can download additional theme bundles starting at $.99 to $4.99. (Apple.com)
Another great app that makes it easy to send personalized postcards, individually or in bulk. (Simplypostcards.net)