Suica Balance Reader - Choimi

Tap your card. See your balance. That's it.

Choimi is a simple reader for Japanese transit IC cards (Suica, ICOCA, PASMO and more). Hold your card against your phone and instantly see the balance and trip history — perfect for travelers and daily commuters in Japan.

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🔍 Features
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◆ Instant balance
Just hold the card against the back of your phone.
Add the home screen widget to see your last balance anytime.

◆ History that stays
The card itself only keeps the last 20 records — Choimi saves them on every scan, so your history keeps growing. Station names are shown automatically.

◆ Multiple cards
Name each card (commute Suica, kids' PASMO…) and switch between them.

◆ CSV export
Save or share your history as a CSV file, with amounts — handy for expense reports.

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✨ Why Choimi
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• No ads — supported by optional donations
• No sign-up, works offline
• Vibration & sound feedback on every scan
• Privacy first — card data never leaves your device
• Japanese & English

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📱 Supported cards
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Suica / PASMO / ICOCA / Kitaca / TOICA / manaca / SUGOCA / nimoca / Hayakaken

Notes:
- Requires an Android device with NFC (FeliCa) support
- Physical cards only: Mobile Suica / Mobile PASMO (cards inside a phone) cannot be read
- Postpaid cards (PiTaPa) and e-money cards (Edy, nanaco, WAON) are not supported
- This app reads balances — it cannot top up your card