I think communication between loved ones should be more personal. I don't think these types of relationships should be encouraged.
You should be calling your mother more. You should be taking the time out of your day to send a personal email or letter if they aren't technically savvy.
I get it, it's easy. Few taps on your iPhone and a postcard is on the way to your Mom.
I just think that life is too short to subject a relationship as important as the one you have with your parents to a mobile app. Can you imagine:
"Hi Mom it's Kelsey, here's a picture of me and my new dog, Snookums!"
-This message delivered to you with no effort at all by HiMom, the mobile app for terrible sons/daughters
Just call your parents. They love you and miss you.