When you have created an account you can reach your data from anywhere by going to https://www.tabextend.com/auth/signin and sign in. On mobile you can save the website to your homescreen and use the site as a progressive web app(PWA) for quicker access.
On iOS you open the website in safari and tap the share button, scroll down and choose "Add to homescreen" in the menu. On Andriod you open Chrome and choose tap "Add to homescreen".
We are also currently working on a full native mobile app that will be released in App store and Play store.