Instagram’s Android launch has been a successful one, with the company hitting the 1 million downloads mark in less than 24 hours since it became available on the Google Play marketplace.

It app had been a long time coming. The company opened registration for its Android variant on March 24, attracting 430,000 pre-registration signups before its launch yesterday.

That interest was translated into actual downloads when the app finally emerged on Google Play, with the service seeing 2,000 sign-ups a minute, ensuring that it has become one of the biggest app releases on the platform in its history.

Screen Shot 2012 04 04 at 10.24.18 520x204 Instagram for Android hits 1m downloads in under 24 hours

Given the huge early excitement, we wouldn’t be surprised if the app broke the 5 million download mark within the coming days.

We decided to put it through its paces to see how the Android flavor compares against the one that iPhone users have grown to know and love. We found that much of the aesthetic had been ported over from iOS, with just a few concessions to Android user interface conventions. There are a few interesting details, which are all discussed here.

Instagram had amassed over 30 million users on iOS alone. The app is off to a great start on Google Play, assisting Instagram in its attempts become the number one photo-sharing app on both Apple’s and Google’s app stores.

Instagram for Android