I recently drove from Tampa, FL to Anchorage, AK. I wanted to send postcard of the pictures I took. So, I tried some different postcard apps.
Ink - unfortunately I had so many problems trying to find postcards in the app. that I gave up and deleted it. It seems this app is more for personalized regular cards .
Post (Social Print Studio) - This app was easy to use and set-up. They make the payment portion extremely easy allowing users to use Apple Pay. They have nice templates, but their isn't much more users can do to customize the photo portion. The cost was $1.99 so not the least expensive but not out of the ball park. I believe the 4 by 6 is a good size.
https://www.socialprintstudio.com/
Postagram - I have used this app in the past because I believe it was one of the first. The app allows you one postcard for free. Then, it's .99 for each one and you can save if you buy in bulk. The PostgramPlus allows users to change the background for an additional charge. This type of thing annoys me, I'm already paying and the background choices aren't even very good. They have a cute feature where the picture on the postcard pops out so it can be saved independently. Unfortunately the picture on these cards are much smaller than other postcard apps.
https://sincerely.com/postagram
Touchnote - I liked the templates and the ability to customize the picture portion. They have all these little add-ons that they want to charge for like special fonts. Again, I really don't like that and charging for things in "credits" where a credit equals $1.99 is annoying and LAME! Besides that the app does everything nicely: 4 by 6 post card, easy to use, and you can use a photo or graphic in the stamp's spot.
https://sincerely.com/postagram
One of the things that I thought all of them handled well was payment, users can use Apple Pay or quickly add another payment method and it remembers the information. I have used a lot of apps where the sign up process and payment portion was a nightmare.
If you are really interested in a higher level of detail about these apps there is a far more in-depth article that I read here:
https://www.dpreview.com/reviews/postcard-app-touchnote-postcard-postagram-ink-snapshot-postcard
So here are some of my favorite pictures from my trip to Alaska:
