You are Downloading CardTest Latest APK 1.1. Last Updated: Nov 23, 2016.
CardTest developed by Bitropy is listed under category Libraries & Demo 3.1/5 average rating on Google Play by 677 users).
CardTest's main feature is What can you read from your credit cards wirelessly?.
CardTest apk was fetched from play store which means it is unmodified and original.
Version 1.1 - Allow running on Android 2.3.3 devices (can't test on these older devices sorry)Details
Out of curiousity I created this demo application to see how much data NFC enabled credit cards give up to a random reader. It turns out they give you pretty much everything you see on the front of the card.
Despite some news reports proclaiming NFC credit cards can be read by passing strangers, in my experience the card has to be in close contact with the back of the phone to get a good read.
Out of paranoia, this app censors credit card info and the content of "track 2 equivalent data" as I would hate to release something that could be used for evil.
This app has only been tested on UK cards, with a Galaxy Nexus so may not work on other credit cards. The app does not save or transmit any of the read data, but you use it at your own risk.
Control Near Field Communication:
Allows the app to communicate with Near Field Communication (NFC) tags, cards, and readers.