Piet Jonas

Keep track of your grades, marks and credits in school and university. This application always shows

Use the old boy scout method and turn your iPhone, iPad or Apple Watch into a sun compass. Just poin

Looking for a time filler or even a new hobby? Let's try to find an new palindrome which is a wo

Take your device to a ride and check the acceleration e.g. in your car, an elevator, on a roller coa

This application turns your device into a speedometer and accelerometer. By assigning background col

Watch the motion force on your device and get alarmed when the acceleration exceeds a self defined l

Turn your iPad into a ruler and measure the scale of any small thing.Features: - switch between impe

This application shows the current local outdoor temperature, measured by a nearby weather station f

Protect your planet from falling rocks as long as possible. Only a few satellites help you maintain

Did you always want to know which day of week you or one of your friends was born? This weekday calc