The use of accelerometers in smartphones is great for a number of reasons, not the least of which is they can rotate screens with a turn of the handset itself. Say you are reading a web page while holding your device vertically, but would like to fit more text on the screen: all you have to do is turn the phone horizontal and your smartphone’s browser will follow automatically.

In some instance, this automatic turning of the screen is a pain, however; say when writing an e-mail. As a result, S4BB has released a utility called RotationLock for RIM's BlackBerry Storm and Storm 2 smartphones.

With RotationLock installed, BlackBerry Storm users can lock the screen of a particular application to portrait or landscape mode. Here is what the app brings to the table:

 

Adds a menu item to all application on your device which will either allow you to “Unlock Screen” and “Lock Screen”.

 

Works on all Blackberry native apps and more.

 

Lets users compose emails in landscape mode or browse memos in portrait mode or any way you wish.

See video below to learn more about RotationLock, which goes for $4.99