Here is the Telus page that lists the channels available through the app.
"Access up to 185 live TV channels with the most popular and specialty channels, including multicultural content
165 channels available in home and out of home
20 channels available in home only"
ABC, AMC, AMI télé, AMI TV, APTN, BC Legislative Assembly, CBS, Chek, Fox, GINX, GMA Pinoy TV, LS Times, NBC, Omni, PBS, The Filipino Channel, TMN Encore, E!, Yes TV, Super channel vault
The Canadian Copyright Act
allows a cable or comparable company to retransmit an OTA signal live to your home without violating the Copyright Act, which means they can do so without needing permission of the OTA station.
Digital transmission outside the home via an app comes under the definition of "new media" and is not exempt. Therefore, licence terms would have to be negotiated with the content owners. Since the affiliates of the U.S. networks are only licensed to distribute the programs within the USA, they can never sign a contract with a Canadian TV provider to distribute anything. Only the channels that have licensed the content for Canada can do so (CTV, Global, Citytv, etc.) No Canadian TV provider can legally provide a feed of a U.S. OTA network through an app outside the home. (Keep in mind I'm not a lawyer.)
FYI the Shaw FreeRange app doesn't allow viewing U.S. networks even in the home.