Consider opening the app to not only be a dating app got guys but maybe for the first time expand the app to focus on allowing girls to meet guys on the app. This platform should have adequate settings toggles to allow girls to sign up and use the app. Internally Grindr could consider advertising to girls to sign up as well promoting the app as a dating app option to them where They can find guys and girls on there since the app is geared towards the gay community which can have many genders involved.

I read similar posts, some even saying make a separate app which is already well known but I suggest keeping it as one app but let users decide via settings what gender can see them listed in the app. Can me man looking for trans etc and or they select manually what they want to see and therefore who can see them.

Any titles to the apps in the App Store to Grindr like "gay dating app" could be changed if need be to target it to everyone and not just the gay community but maybe gay and lesbian community or LGBT community, a likely commonly used app search term for dating apps.