Celsius Thermometer Plus is a free digital thermometer application available for iPhone. Developed by SHIGETO TAKAGI, this app measures the ambient temperature of the current location using GPS and displays it in degrees Celsius. With a simple and straightforward interface, this app provides users with an easy way to check the temperature around them.

One of the standout features of Celsius Thermometer Plus is its conversion calculator, which allows users to convert Celsius to Fahrenheit using a simple formula. This is especially useful for those who are more familiar with Fahrenheit and want to quickly convert temperature readings. The app also displays the Celsius temperature in the badge, with below zero temperatures represented as 1000 and negative temperatures shown as 1005 ℃.

In addition to temperature measurement, Celsius Thermometer Plus also includes a barometric function that utilizes the pressure sensor on iPhone 6 and later models. This provides users with more accurate temperature readings based on barometric pressure. However, it's important to note that this app measures outdoor temperature rather than indoor temperature, so it is best used as a reference for outfitting clothes accordingly.

Furthermore, Celsius Thermometer Plus displays the sunrise and sunset times, allowing users to plan their day accordingly. This can be particularly helpful for outdoor activities or when traveling to new locations.

Overall, Celsius Thermometer Plus is a simple and useful app for quickly checking the ambient temperature of your current location. With its conversion calculator, barometric function, and sunrise/sunset time display, it offers a comprehensive set of features for those who need to stay informed about the weather.