At present, the app offers up four modes: Kore (accelerometer, magnetometer and gyroscope), Clima (climate), Luma (flashlight) and Therma (infrared thermometer), with lots more planned soon.
When nearly 30 years ago Dr. Jacob Fraden invented an ear thermometer working on this second principle, the infrared light sensor was so large that he needed a narrow gold-plated reflective tube to channel the light from the ear drum to the sensor.