I constantly wonder if I used the right card for past transactions, and this app has everything set up for a killer feature: in the transaction history, flag transactions that could have netted more points if another card was used, and show which card.

For example, we have a large vendor bill every month that I pay with my business card, but what if I'm making the wrong choice and another card would have given me 3x more points?

The killer part here is you already know with 💯 certainty how many points I got awarded (1x, 3x, etc.) as well as what the category was, so recommendations should be super accurate.

And this would also be a fantastic place to recommend other cards that I don't have yet that would have generated even more rewards. Heck, you can do it on a per transaction level, but also on a per year level - whether another card would have saved me money sans the annual fee.

So many possibilities here.