Hi,
From what i understand, it will just be as similar when you log in using a desktop to check on your status. However, you should only log in using this mobile app only with your personal phone, since one-time log in lang cya and it will lead you to your status everytime you open the app. It should be safe, unless you lend your phone to someone you don't know or got lost unfortunately.
This is an excerpt from the Itunes' application description
"Once you enter your application information is saved on your device only, and will be used every time you press the button to check your status. No on-line storage of your private information. "
But ofcourse, whichever way you prefer best to check either this or on desktop/laptop will be your own discretion..
Hope this helps..