"What I love about Postagram is that it makes it so easy to bring your photos back into the physical realm. Sincerely aims to bring back tactile photo sharing, the kind we used to have with picture frames and scrapbooks."

"Sincerely is going to continue to innovate...sending physical postcards using photos you already have stored online has a huge opportunity to blossom into a powerful market."

"PopBooth cleverly re-imagines the photo booth for a mobile photo-obsessed generation and we suspect Sincerely's second product will become a fast hit on the App Store."

"The service...allows you to take any picture you've captured and send it in postcard form for a mere $0.99. Yeah, I'm going to use this all the time."

"Sincerely's business is simple but ambitious: make it easy for users to make physical copies of photos taken on their mobile phones."

"Apple's chief rival is Sincerely, a 12-person San Francisco start-up that rolled out its greeting card app Sincerely Ink last month."