Carbon, the third-party Twitter client that debuted on webOS before eventually launching for Windows Phone, is headed to Android this month and will be a free download. In a Google+ post yesterday, developer Dots & Lines said it aims to submit the Holo-themed app to Google Play the week of July 22nd and that those who have been testing alpha builds of the app will be receiving an update to a near-final beta version soon.

Best of all for Android users, Carbon will be made available for free — though that clearly wasn't the plan when work originally started on the project. Rather, Carbon is being offered gratis because its developers have no choice in the matter: Google doesn't currently accept paid apps from the United Arab Emirates. The restriction has had a negative impact on the team's motivation and even caused Carbon for Android to be temporarily shelved between April and May. It was hoped that Google would announce expanded support for paid apps from new countries at Google I/O, but that obviously didn't come to pass.