Thank you for contacting Slingbox Forum. I am glad you asked about the mobile Apps!
The mobile Apps cost $29.99. If you have an Apple product, you can get them at the iTunes Store, either on the device or the computer. The Apps for the Android phones or tablets are purchased on the GooglePlay market. Please check on our link: SlingPlayer for Mobile Devices and choose your product to get all the information you need before you buy it.
Hope this helps you!
Have a great day!
Sling Moderation Team