Pair, an app that helps couples stay in touch, no longer discriminates against cross-platform romance.

The startup launched its first Android app on Tuesday.

Like its iOS counterpart, the new app creates a private shared timeline for couples that allows them to easily swap SMS messages, photos, videos and locations.

The app takes the concept behind Path a step further. Instead of sharing personal updates within a small network, it’s a way to stay constantly connected with the smallest of networks — one other person.

Since launching in March, Pair has picked up about 220,000 users, $4.2 million in funding and a lawsuit over its name.

Until now, however, only couples who both had iPhones could use the social network for two. Those with Android-toting significant others couldn't participate, even if they had an iPhone themselves.

Pair's iPhone and Android apps are identical, down to a feature called “thumb kiss” that vibrates when both parties touch the same spot on the screen. Couples can also co-create drawings, maintain a joint to-do list and send a “thinking of you” message that works like a more thoughtful Facebook poke.

Though some have dubbed Pair "the perfect sexting app," co-founder Oleg Kostour says the most-common activity on the app is actually doodling.