in answer to your questions:
1) usually you need to have a separate Analytics licence as it is a separate installation package. You would then access your Analytics dashboard to see the reports.
2) there isn't an completed app you can download as such. however there are mobile toolkits that allow companies to create mobile applications for Android and iOS devices using the toolkits. This does mean you will need an IOS or Android familiar dev to create them for your site though I believe. I think you will need to request these toolkits from support.