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The range of temperatures that the iPhone app can measure depends on the specific app and its capabilities. Some apps may have a wider range than others, but most typically can measure temperatures from -4°F to 122°F.
The accuracy of the temperature measurement can vary depending on the app and its features. Some apps may use the iPhone's built-in temperature sensor, which can have a margin of error of up to 2 degrees. Other apps may use external sensors for more precise measurements.
It depends on the app's capabilities and the temperature range it is designed for. Some apps may be able to measure extreme temperatures, while others may not. It is important to carefully read the app's description and features before using it for extreme temperature measurements.
Some iPhone apps may have additional features or tools, such as data logging, graphing, or alarms, for measuring hot temperatures. It is important to research and compare different apps to find the one with the features that best suit your needs.
Again, this depends on the specific app and its capabilities. Some iPhone apps may be designed for professional or scientific use and may have the necessary accuracy and features for such purposes. However, it is always best to check with the app developer and do your own research before using the app for professional or scientific measurements.