OS (Iphone) Apps
Currently IOS lacks write support for NFC. However they’re a few NFC tag info tools that can read the implants and other NFC tags.
NXP TagInfo
Taginfo NXP - AppleStore
Can see a video of it here in on a xNT.
Other IOS Apps
NFC Reader for Iphone - AppleStore
GoToTags -AppleStore
NFC Ideas - AppleStore