Piet Jonas

A chess clock consists of two connected clocks which can't run at the same time. Use it as a game clock to measure the time used by two players for th …

Measure the time you work and calculate your earnings. The timer keeps running even when you close the application. So there is no need to keep it ope …

Calculate the boiling temperature of water and the air pressure for your current elevation on earth or any other altitude. Features:- Read your curren …

Remember the old egg spoon races on kids birthday parties? Now you don't need an egg and spoon anymore. Just run it from your device and your kids are …

Take your device to a ride and check the acceleration e.g. in your car, an elevator, on a roller coaster or during take off and landing. The accelerat …

This application turns your device into a speedometer and accelerometer. By assigning background colors to speed ranges you can see from the corner of …

Simulates a glass ceramic cooktop. Use your device as a hob avatar e.g. for kitchen planning. You can control the hob by pressing the buttons, use the …

Measure the time you take your shower (or to water the lawn) and calculate the amount of water used and how much you have to pay for it.You can save a …

This application shows the current local outdoor temperature, measured by a nearby weather station for which it uses your current location.Features:- …

Train your memory and play a game of Pairs with the SpeedyMarks icons.How to play (in case you don't know):- Tap one card- Tap a second card- If cards …