"おしりたんていきえたサンタクロース" is an educational and entertaining iPhone application developed by FLAMA Inc. This program falls under the category of Education & Reference, specifically in the Books subcategory. The app presents a story where Santa Claus visits the protagonist, おしりたんてい, with a mysterious letter, leading to a new engaging adventure. Users can interact with the story by touching おしりたんてい's face and enjoy the unlimited free distribution of this app as a Christmas gift.

The app offers a fun and interactive experience for children, with a whimsical storyline and engaging illustrations. Additionally, it is part of a series of four books, expanding the adventures of おしりたんてい for more entertainment opportunities.