Greetings QPQuaddleDDS,
Thank you for taking the time to post. Activision is constantly working on improving the Call of Duty App so it can become compatible with more devices in the future. I will be forwarding your feedback to the appropiate parties. Your comment about making a web app so it can become more accessible to users will be very valuable. Activision is listening to all the feedback provided in regards improving the App.
Sincerely,
^CA
ATVI Support