Tool for Rewards maximization

[M!tesh]

I have multiple credit cards. Every time I pay, one question comes to my mind which one to use to get maximum rewards. is there any tool which can help me with this? How you guys are managing this?

 

[akshayhs]

By memory.

 

[BK7]

I have multiple credit cards. Every time I pay, one question comes to my mind which one to use to get maximum rewards. is there any tool which can help me with this? How you guys are managing this?

It's so complex system that's why people still not created it 🤣