The VivoKey NDEF applet enables the Apex chip to act like an NFC Type 4 tag. You can use any standard NFC application to write NDEF data to your Apex based device, and use any NFC compliant phone or reader to read that NDEF data - just like any other NFC tag. Below are some popular NFC applications for Android capable of writing data to the VivoKey NDEF applet.