This app displays a graph of Temperature (Celsius) vs. Time (s) that can be exported as comma separated values (csv).
This app requires a phone with an ambient temperature sensor; the Galaxy S4 and Note 3 have the sensor.
android.permission.WRITE_EXTERNAL_STORAGE: A csv file is created and modified on the phone's internal memory.
If you have any questions, comments, or would like to see modifications/updates, please email me at vieyrasoft@gmail.com