App Store Review Guidelines said:
"3.1.4 Hardware-Specific Content: In limited circumstances, such as when features are dependent upon specific hardware to function, the app may unlock that functionality without using in-app purchase (e.g. an astronomy app that adds features when synced with a telescope)."
My app has the feature to read NFC tags and write information to normal NFC tags. My app must have that NFC tags features. My app offers auto-renewable subscription with free trials without unlocking that NFC tags features.
I think telescopes and normal NFC tags are different. Normal NFC tag is very cheap general-purpose product.
Will Apple reject my app?