Sending RFID data to an Android app I have fetched the RFID tag value using an RFID reader and it is now in my Arduino's serial monitor. I have to send it to an Android app. I need help on how to do this.

I don't want to use Bluetooth.
To send values to Android App you need some medium either it is wireless (Bluetooth, which you don't want to use, or via internet by using a web server on Arduino or PC, through which the Arduino is connected) or wired through Serial communication.