Saldo ID lets you check your e-money and toll card balance instantly via NFC — just tap your card to your phone, no minimarket trip needed. What's different: most balance checks require a physical terminal. Saldo ID turns any NFC Android phone into a reader in seconds. Features: Instant NFC balance check Local scan history Clean Material 3 UI Lightweight & fast Free, with optional ad-free upgrade Built for Indonesia's daily commuters, but the NFC approach works for similar contactless cards too.