RightCard

RightCard tells you which of your cards to use at any store and auto-adds the bank offers you'd forget to activate (Amex, Chase, Citi, Wells Fargo). It keeps rotating 5% categories straight so you don't have to remember them, and warns you before card credits and annual fees renew. No bank login, no account, no tracking — the Safari extension reads the offers page you're already signed into, and recommendations are computed on your phone, even offline. Honest numbers only. Free, no ads.