Your wallet stays in this browser on this device. No bank login, no card numbers, no sync, no ads. Export JSON to keep a copy.
Before you pay, see which card in your wallet earns the most: per-category rates, monthly caps and milestones, shown as plain math. No bank login, no card numbers. Free, local, no account.
Cardpick only does the arithmetic on the rates you typed. It is not financial advice: rates, caps and milestones change, so check your card's current terms.