First, please install Violentmonkey, the userscript may not work properly if you use Tampermonkey or Greasemonkey.
Go Greasyfork download and install IVE Att & Abs Calculator. *Please ensure you are using Violentmonkey.
To enable to use the IVE Calculator. You need to register an account at this website. After complete registration, go profile page, copy the secret key, and go myportal to bind your account the userscript.
After you have finish bind your account to the userscript, you need to refresh the page, but remember F5 it doesn't work for myportal, so it means you need to select another module for refreshing.
In the end, you will see a button at the bottom right of the website. Just click it and type in the total hours of current module.*Please make sure your current module have ever attended.