This is a great app developed for both iOS and Andriod which gives you access to your applications via RD Web.
You will first need to purchase the app from the app store, it’s called iTap RDP.
After installation, follow the below screenshots with your credentials.
Enter your credentials.
Save and select done.
Your will then see your apps in the apps stream on the left.
Select the app you wish to launch and click connect.
There are various gestures within the app to access the mouse / keyboard etc.
For more information and and a guide please visit the below link.