Chinese Numbers is an app designed for the iPhone and iPad that helps you learn and practice numbers and counting in Mandarin Chinese. It has 2 input methods for translating numbers, and a challenging game to help you practice recognition.

River of Chinese is an app designed for the iPhone to help you learn and review vocabulary in Mandarin Chinese.

World Clock - Time Shifter is an iOS app for tracking the time in multiple locations around the globe. See the time simultaneously in New York, London, Beijing, or any combination of cities. Adjust the time forward or backward to see the time shift everywhere. Great for planning global travel, or even just arranging long-distance calls.