In-app purchases accounted for 43 percent of mobile app revenues in 2017, according to Statista, and in-app revenues are set to reach $117.2 million in 2020, up from $40.5 billion in 2015.

With cash like that at stake, it’s no wonder that Square wants a cut of the action.

The San Francisco company today announced Square In-App Payments SDK, a suite of tools for iOS, Android, and Flutter that allows developers and sellers to accept payments within their own apps.

It’s available today in the U.S., Canada, the U.K., Australia, and Japan.

Carl Perry, developer lead at Square, pointed out that now, businesses can use Square’s platform to accept payments in every major channel: brick-and-mortar, online, and on mobile.

“With the introduction of in-app mobile payments to the Square platform, developers now have a complete, omnichannel payments solution for all their payment needs,” Perry said.

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