In Korea one 'do-it-all transit card' handles subways, buses, taxis, and even convenience-store payments. You buy it at a convenience store and top it up with cash. What's the flagship name?

T-money is Korea's flagship prepaid transit card, purchased and topped up with cash at convenience stores like GS25 and CU, and accepted across the vast majority of buses, subways, and taxis nationwide, plus usable for small purchases at partner stores. Its convenience comes from consolidating fare payment across different transit operators and cities into a single card rather than requiring separate tickets for each system.

K-pass is actually a related but distinct fare-discount program layered on top of transit payment rather than a card brand itself, and 'Korail card' describes something specific to national rail rather than the broad everyday transit card most people use daily.

Physical T-money cards are increasingly being supplemented or replaced by mobile T-money built into smartphones and by ordinary bank cards enabled for post-paid transit, showing how the underlying T-money payment network has outlived its original plastic-card form.