We recently released the our new iCaisse4X NFC, an accessory that enables full NFC capabilities for the iPhone 4 and iPhone 4S. If you're interested in licensing our API to build apps for the iCaisse4X NFC please sign up at the link below. All apps built are eligible for submission to the App Store provided it meets the Apple and DeviceFidelity guidelines for NFC tag reading apps for iCaisse4X NFC.