iPhone developers rejoice! Apple (NASDAQ: AAPL) has switched on its e-commerce feature for free iPhone and iPod Touch apps, which means that developers won't have to make multiple versions for free and paid mini-programs running on the devices.

Prior to the change, Apple allowed payment transactions for content, subscriptions and digital services only in apps priced at $0.99 and up.

This meant developers had to create duplicate versions of the same app, such as a free one to get users interested, and a separate premium version with more features. Now, they can include the option to upgrade to the premium level in the free version.

There are restrictions, however, on how the feature can be used within free apps.

Get the full story here at InternetNews.com.