" We only mapped apps for gay dudes (and straight/mixed orientation apps in a separate map) because the market for apps specifically targeting lesbians is much less developed and couldn't be compared across borders in the same way.

Features: All users (or "Romeos") can classify photos into five different categories: non-sexual; some skin; softcore; hardcore; and illegal.

Users can set their location anywhere they want if they need to line up dates before traveling; they can also keep their location totally private.

The lesbian, gay, bisexual, transgender, queer and questioning (LGBTQ) community faces mental health conditions at a rate almost 3 times higher than that of the general population.

The fear of coming out and being discriminated against for sexual orientation and gender identities, can lead to depression, post traumatic stress disorder, thoughts of suicide and substance abuse.

Most popular in: USA, UK, Mexico, Brazil, Bahrain, Australia, France, Indonesia This app markets itself as "the global network for meeting gay men." Features: Allows users to find men by proximity, see who has checked their profiles, buy and send gifts, and browse through profiles.

Users can also pay to unlock premium in-app features.

If you're chatting with someone who speaks a different language an "auto translation" feature will translate your messages as you send them. Lester Feder is a world correspondent for Buzz Feed News and is based in Washington, DC.

His secure PGP fingerprint is 2353 DB68 8AA6 92BD 67B8 94DF 37D8 0A6F D70B 7211 Contact J.

You can apply filters to narrow your search and send photos in chat, as well as make a very short profile description.

Of course, being the most popular doesn't always mean you're the best.

If you suffer from a serious mental illness it is important you seek help from a healthcare professional If you think you may have a medical emergency, call your doctor or 911 immediately.