Don't install Shinigami Eyes. Its accuracy is EXTREMELY low, and it oftentimes mistakes actual transgender people for transphobes and vice versa. This is not a reliable application in its implementation, and it seems to frequently mismark transgender individuals who do not identify with a binary gender in a traditional way (ex. people who don't fit into categories such as stereotypical boys who like blue and girls who like pink). I do not know if that is by design, but it would not surprise me if it was so.