GoToTags is accepting applications to be a beta tester of the GoToTags iPhone App. To apply to be a beta tester, submit the iPhone App Beta Tester form. Be sure to use the same email address that is registered to the Apple account to be used. Accepted beta testers will receive an email from Apple with instructions on how to download the Apple TestFlight app and the latest beta release of the GoToTags iPhone App.
The iPhone App works on all iPhones with iOS 10+, but the NFC functionality only works on iOS 11+. Until iOS 11 is released to the public, only users that have joined the Apple Beta Program and installed the public beta of iOS 11 will be able to use the NFC features.