The MAX30102 is a pulse oximeter and heart rate sensor module with integrated LED and photodiode while the MAX30110 is a chip-only pulse oximeter and heart rate analog front end (AFE), which requires an external LED and photodiode. Each has its own advantages. MAX30102 has a built-in red and IR LED and is mostly used for finger measurement. MAX30110 provides flexibility in the placement of the LEDs and photodiodes, and is suitable for wrist applications but can be used for finger as well.