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This new dating app will use facial recognition technology to exclude trans women
(www.lgbtqnation.com)
This is a most excellent place for technology news and articles.
You'd be better suited just having a user select that they are comfortable dating a trans individual because it will likely come up very early in the dating process anyway.
Forcing someone to identify as a gender that doesn't make them comfortable is just going to result in them not using your app and is frankly kind of a dick move overall. Your suggestion would just create an app that was suited for chasers, not trans users.