PostSnap is a free and easy-to-use postcard app available on iPhone that turns your photos into real printed postcards. With PostSnap, you can personalize your photo postcard by adding your own message and send it to your recipients as easily as sending a text. The app offers 6x4 inch standard postcards and 7x5 inch large postcards, which are printed on high-quality card with a bright glossy laminated finish to protect your postcards in the mail.

PostSnap's personalized postcards are priced at just $3.49 each, including first-class USA postage. You can even mail your photo postcards anywhere in the world for a small additional shipping charge. The app doesn't require any subscription or sign-up, and you pay for your postcards as you go. PostSnap also offers photo printing services with professional quality prints available in different sizes starting from just $0.35 per print. In addition, you can buy personalized greeting cards and announcement and photo invitation cards for all occasions.

Overall, PostSnap is a great app that makes sending personalized postcards and printing photos fast, fun, and effortless. PostSnap is rated "Excellent" on Trustpilot with overstar ratings.