NFC Counter is a FREE and OPEN android application that uses NFC tags to increment a counter on your android phone. Bring any NFC tag near your phone to increment the counter.
Can also be used as a Islamic salah rakat counter. Place your NFC enabled android phone on your prayer mat. Wear a NFC ring or watch. Slightly touch the phone while in sujood. This increments the count and helps keep track of how many rakats prayed.