I work with a software development team inside local government. Our team have developed an app for Apple IPhone 6 SE with Cordova that requires carers to check-in to client visits. Clients typically are vulnerable people, like the aged and severely disabled.We would like the check-in to be possible only when the carer is at a client's home. We absolutely need to ensure this, to prevent potential fraud.   One idea that has been touted is a fob kept in the client's home alongside their care docs. The fob will contain a code identifying the client. Only when the fob is plugged into the IPhone will the app allow checkin.Would any of you know if such a device exists? Or a similar type of solution?IBeacons have been mentioned but are too expensive per unit.Thanks in advance.
Apple security fob
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