Poster Printing is a free iPhone app developed by Vitalij Schaefer that allows users to print images as large posters. With this app, users can transform their favorite images into impressive poster-sized prints.

The app divides the image into several pages, which can be printed separately and then assembled to create the final poster. To assist with the assembly process, a thin border line is printed on each page, making it easier to cut off the white border and align the pages correctly.

To avoid confusion, the pages are numbered discreetly at the bottom left corner. However, users have the option to deactivate the printing of page numbers through the app's settings.

One of the key features of Poster Printing is its automatic rotation capability. The app intelligently rotates the image to better fit the paper size, reducing the number of pages required for printing.

In the free version of the app, users will encounter ads and the maximum size for posters is limited to 60 centimeters and 24 inches. However, users can extend the size limit by making a one-time in-app purchase. Additionally, ads can be completely removed with another one-time in-app purchase.

It is worth noting that creating very large posters may require a significant number of pages to be printed. Therefore, the app encourages users to double-check the entered size to avoid unnecessary paper waste.

With Poster Printing, users can easily create stunning posters from their favorite images, making it a useful tool for both personal and professional purposes.