This app can receive raw data from Arduino UNO via HC-05 Bluetooth module, and display recorded data in line graph. Sensor used in this project is temperature sensor (LM35),other sensor can be used as well.
Line graph library used in this project are MPAndroidChart, developed by PhilJay (github link: https://github.com/PhilJay/MPAndroidChart)
google drive link for screenshot videos, zipped Android project, and arduino code: https://drive.google.com/drive/folders/16qZtwbAnVsG9mztaHEDUIq2WpJhcfJrM?usp=sharing