Ah, I think you are right. Wikipedia says, "The law in most jurisdictions also allows the owner of a registered trademark to prevent unauthorized use of the mark in relation to products or services which are identical ... The test is always whether a consumer of the goods or services will be confused as to the identity of the source or origin." I'd say it's reasonable that people aren't going to be confused by the difference between a social media product (or whatever you'd call this) and a biometric device. Then again, both products have a connection to personal identity.

[0] https://en.wikipedia.org/wiki/Trademark#Registration