Arduino PN532 & RFID Reader ID-20LA communication with Android

I am working on an RFID/NFC system where the functionality goes as follow:

  • PN532 will read and register Android Phone using NFC
  • FID Reader ID-20LA will read RFID tags

After the phone is registered in Arduino using PN532, i want Arduino to be able to update the list in Android app with the tag information every time ID-20LA reads a tag.

What is the best approach for this project?

Thank You