The Lapka app is referred to by its inventors as "a personal environment monitor" on its site. What does that mean? Lapka is a set of sensors that attach to your iPhone and monitor various aspects of your environment.

One measures the amount of nitrites in your food and water, which translates to measuring how inorganic your food is; one measures the amount of EMF radiation around you, which translates to measuring the amount of electromagnetic radiation around you. Another measures the temperature and humidity around you, and the last measures radioactivity. All this information is then shown on your phone screen.

Whether you'd like the app because you think it's fun, or because you actually care about these measurements, the Lapka app is a beautifully designed way to learn more about your immediate surroundings.