Skim Plus

A lot of people have fallen victims of credit/debit card skimming and this could hurt greatly. Fraudsters are getting more sophisticated by using Bluetooth devices to skim cards. Here is a good app that was developed against such technology. According to the developers of the app

Skim Plus gives you the ability to Scan for Bluetooth Skimmers placed on or in devices such as Fuel Pumps and ATM's which steal your Credit or Debit Card Information. source

Worth checking out.