SharePlus for iOS is available in three variants: Lite, Pro and Enterprise. I don’t have access to the Enterprise version of the product so will focus only on the Lite and Pro versions within my posts.
The web site for the iOS version of the product is here: http://www.sharepointoniphone.com/.
This article is specifically on the Lite version aka the free version. This post is based on version 2.9.8 which is in the App store as at 5th March 2012. The review is done on an iPad running iOS 5.0.1. Features available within the Lite version are shown in the table below: