Celsius Thermometer Plus is a free thermometer application available on Android. It allows users to measure the ambient temperature of their current location using GPS and displays the results in degrees Celsius. The app also includes a conversion calculator from Celsius to Fahrenheit using a formula and a barometric function.

As the app measures outdoor temperature instead of indoor temperature, it can serve as a reference for choosing the right clothes to wear. However, it's worth noting that some areas are excluded from the app's coverage. Overall, Celsius Thermometer Plus is a straightforward and useful tool for anyone who needs to know the temperature of their surroundings quickly.