Yes, it's still need to find a computer to connect
https://mewconnect.myetherwallet.com/#/, according their introduction page, "MEWconnect stores your private keys safely in a local, isolated, and secure vault on your device to protect your account", so it's "hardware wallet" without hardware.
I don't think many people use this MEWconnet. Because most people use MEW on the web or through computers and laptops. Because each transaction certainly cannot be done carelessly. And for security it seems that cellular and Web both have good security.