Remember Postagram? The cool little app that would allow you to print your Instagram photos as postcards, and send them to anyone in the USA for just $1? Well the engine behind that service is called Sincerely, and they’ve just released an API. This means that any photo app on the planet can now add their tools, allowing you to take your photo, print it, and send it — for less than Apple’s Cards.
The service already worked with Postagram and Popbooth, but now Sincerely is expanding it to twelve more launch partners: