Need an app to control elderly parents TV

My 90 yr old mother (who lives in assisted living facility) cannot use the remote to get the programs she wants to watch.  It's too complicated for her.  I can't even get her to correctly use the voice activation feature.  I tried downloading the xfinity remote control app, but it won't work even though her account is linked to my xfinity account.  She loves to watch tv, but it's useless unless I can change the channel for her.  Any ideas?  Does product development read these posts?  I would think this would help every person with an elderly parent----we're talking MILLIONS of people!