Will TunnelBear work on my old iPad with iOS5?
No, TunnelBear won't work on the iPad with iOS 5. According to the system requirements, the application requires iOS 7.0 or later to work properly. Older versions of TunnelBear were compatible with older versions of iOS, but since it's impossible to install them, you need to have iOS 7 or later.
App's page: https://itunes.apple.com/us/app/tunnelbear-vpn-unblock-websites/id564842283?mt=8