교통카드 잔액 확인 - 0.1초 NFC 리더

Before boarding the bus, before passing through the subway turnstile!

Have you ever wondered, "How much balance is left on my transportation card?"

'CardBalance' is an ultra-lightweight, single-purpose utility that displays your balance in large numbers in just 0.1 seconds simply by lightly touching your card to the back of your smartphone, without the need for complicated logins, sign-ups, or advertisements.

■ 0.1-Second Ultra-Fast NFC Balance Check

As soon as you place a prepaid transportation card against the center of the back of your smartphone, the balance bytes are accurately parsed using ISO 14443-4 standard APDU communication.

■ Clear and Large Typography & Haptic Feedback

- Clear and large balance display that can be read at a glance even from a distance (e.g., 4,500 KRW)

- Pleasant short vibration felt at your fingertips upon success (Haptic Feedback)

■ 100% On-Device · Strict Privacy Protection

- No sign-ups, no logins! - Operates 100% offline and standalone without external server connectivity. Works even in airplane mode.

- Does not store or transmit card numbers, financial information, or personal data externally.

■ Supported Cards

Fully supports major prepaid transportation cards that comply with the Korean KS X 6924 standard.

- T-money

- Cashbee / EZL

- One Card All Pass (Nationwide Compatible Transportation Card)

- Rail-Plus

※ Postpaid transportation cards (integrated credit/debit cards) are not supported for lookup due to card company policies and security area encryption.

■ Proper Usage Tips

1. Activate NFC from the Quick Panel at the top of your smartphone (Basic Mode or Card Mode).

2. Place the transportation card against the center of the back of your smartphone (near the camera or the central NFC antenna).

3. Thick cases (metal materials, magnetic mounts, etc.) may interfere with recognition, so removing them before tagging will result in faster recognition. ※ This app is a single-purpose utility dedicated solely to checking your balance.