iOS - SharePoint NewsFeed
The SharePoint news feed app is a great app that you can use on an iPhone,iPad, or iPod Touch. The app allows you to stay in contact with the documents or people that you follow on your SharePoint site. Once you download the app and install it, just launch it and lets configure it.
Next, you want to use your Email address as your Username, then your password, and put the URL for your SharePoint site. If you do not know your URL, log into your Microsoft Portal, click "Sites" on the top right, then click "Team Site". The URL should look something like http://appriver3651XXXX.sharepoint.com. That is all you need to put in the URL box.
Microsoft has a really good article on this so no need to recreate one. Please visit this link for more information on this SharePoint app.