OXI Tracker, developed by Guangdong Biolight Meditech Co. Ltd., is a free Android app that links to a pulse oximeter through Bluetooth. The app displays real-time blood oxygen waveform, SpO2, PR, PI, and their trend charts. It is designed for people with blood vessel or respiratory diseases, seniors over 60, or those who frequently participate in extreme sports or work in oxygen-deficient environments.

The app's data trend can also be used for sleep state analysis. OXI Tracker is a helpful tool for daily maintenance and monitoring of blood oxygen levels. The app is easy to use and provides accurate readings, making it a valuable addition to the health and fitness category of lifestyle apps.