separate app for fidelity visa or can it only be accessed through fidelity app?

I always go through the fidelity app when I need to check anything with my fidelity visa but I've often wished there was a separate financial app I could use for the credit card separate from my other accounts. With my Schwab investor card, I can manage the card directly through the amex app, for example. Does any such app exist for the fidelity visa, or is the only way to manage one's card through the fidelity app?