APPen is a revolutionary tool for coloring, drawing, learning, and playing. This iPhone application allows users to unleash their imagination by providing various features for creative expression. One of its standout features is the ability to vary line thickness by adjusting the pressure applied with the pen on the tablet. Additionally, users can animate their drawings using stickers, adding a touch of interactivity to their creations.

The app offers a range of colorful pencils and ten drawings ready to be colored in, providing ample opportunities for artistic exploration. It also includes educational activities to help children learn how to write letters and numbers in a fun and engaging way. Another exciting feature is the "scratch&guess" game, where users can guess hidden objects for a playful challenge.

APPen offers a unique combination of educational and entertaining activities, all within the convenience of a pen. Please note that for iOS 7/8 users, it is important to ensure the microphone permission for APPen is enabled in the device's privacy settings.