I don't know about alternatives, but I noticed that when I hooked up my Amex to Apple Pay, every transaction shows up as a push notification on my iPhone, nearly instantly.
I found this useful when I was wondering about a charge that I wasn't expecting pop up. I logged into the card issuer's online portal and found that it was something I care about, but simply forgot it was pending. Though if it was a fraudulent charge, I could've just gave them a ring. It certain can help in noticing fraudulent transactions in a much shorter time frame than simply waiting for a statement.
Edit: Actually, I mis-remembered. Internet charges on the Amex do cause a notification. But not for any of the other cards.