They have also released the app on Android across all markets.
Their CEO, Robyn Exton, was in New York at the Lesbians Who Tech summit for the launch.
They have released in New York just in time for the Pride festival next week.
Dattch is a dating app for lesbian, bisexual and queer women, which builds profiles using Instagram-style interest-based photos.
On a recent Reddit AMA, Exton explained the focus of the app:
“Tech is a very male led industry, dating is too, so men always built the products and made a whole series of assumptions based on their behaviour.
“The products then worked well for men, men used them, and the businesses made money from them. So then they keep building features that worked well for men, its a vicious cycle.
“It seems like at no point has anyone gone — wait a minute — what if we actually built for women?! What would that look like?! And that’s what we’re trying to do at Dattch.”
To join the app, users must either verify themselves by replying to a private message on Facebook, or to confirm their identity over the phone.
The team also check email addresses to see if they have been used to sign up for other social media accounts, to be as clear as possible that the user is genuine.
Exton says the reason for this is that they get around 5 men every day trying to join the app to meet lesbian women.
In their last update, the London-based company changed their Would You Rather? feature, which originally let users choose between a photo of another female user, or something like an activity, object, or food.
The team first launched in the UK, before expanding to the US, opening in San Francisco, Los Angeles and Florida.
They have raised $160k in funding, and plan to continue to expand throughout the US.