Hi HN! I'm the developer of FareBot, a free/open-source app that reads balance and other information from contactless transit cards using NFC.

Supported cards include:

- ORCA - Seattle, WA, USA 🇺🇸

- Clipper - San Francisco, CA, USA 🇺🇸

- Suica, ICOCA, PASMO, Edy - Japan 🇯🇵

- Matkakortti, HSL - Finland 🇫🇮

- Octopus - Hong Kong 🇭🇰

- Opal - Sydney, NSW, Australia 🇦🇺

- Myki - Melbourne, VIC, Australia 🇦🇺

- NETS FlashPay - Singapore 🇸🇬

- EZ-Link - Singapore 🇸🇬

Download: https://play.google.com/store/apps/details?id=com.codebutler...

Source code: https://github.com/codebutler/farebot

Happy to answer any questions!