Here is an example of a report in SQL 2008 R2
Starting with SQL 2012 Service Pack 1 (SP1), Reporting Services supports viewing and basic interactivity with reports on Apple iOS devices like IPad en Iphone, with the Apple Safari browser.
Viewing reports in Report Manager (http://myserver/reportserver) is not suppported. You need to start the reports from the report server via http://myserver.reports. Here you can browse to the report and tape the report name to open the report. After opening the report yiu can see that the Export to PDF and TIFF file is supported. More information about the support for Apple iOS devices on SSRS can be found here.
For a video of using SSRS on your Ipad please see: