The popular photo-sharing app for iOS, Instagram, has finally arrived on Android and it's making a big splash. Sign-ups have been taking place at a rate of 2,000 per minute, setting the app on course to easily achieve the 30 million install base the iOS app has.

Instagram has over 27 million users who have signed up to the iOS app since its release 17 months ago, in October 2010. With the Android version now available for devices running Android 2.2 (Froyo) and up, though not tablets at the moment, Kevin Systrom - the company's chief executive - says users have been signing up at a rate of 2,000 per minute, or around 3 million a day.

In a blog post, it was stressed the Android app brings over the same functionality and same experience from the iOS app. The only filters missing are Tilt Shift and Blur.

"Even though the Instagram camera is solid and performs well as is, I would love to see a few additions in the next update. For one, this Android app absolutely needs Live Preview ... you can't preview filters before snapping ... Also, it would be nice to get the Tilt Shift/Blur feature that iPhone users use to achieve the popular Toy Camera effect," CNET Asia reports. Instagram for Android is supposed to pack these features in future updates.

Instagram will likely see its user rate rapidly rise with the launch - the app's users upload more than five million photos a day, to services such as Tumblr and Twitter.

Over 430,000 Android users had signed up when it was announced that Instagram would come to Android. So those will quickly get their hands on the app.

Instagram for Android was teased last month at South by Southwest Interactive, a show that highlights start-ups. On stage at the event, Systrom and Mike Krieger - from the design and development team - said the app was better than the iOS version.

"[I]n some ways, it's better than our iPhone app," they said.

Some devices are reported to not be compatible with the app, despite only requiring Froyo to run. The Verge says an update has resulted in a message saying the camera isn't supported on the HTC One X, despite Instagram using the device in its promo shots.

(reported by Jonathan Charles, edited by Surojit Chatterjee)