Trip Reader uses iPhone's internal NFC reader to get balance and history from public transit cards issued across China. No Internet or Bluetooth is needed.
Main features:
•  Balance and history
•  Show station names
•  Monthly discount policy and progress
•  Bus route number
•  Save history and comments
•  Sync to iCloud
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Beijing Yikatong is not supported due to technical reason.
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Cards supported:
•  Beijing Hutong Card (京津冀互联互通卡, with T-Union mark)
•  Tianjin City Card (with T-Union mark)
•  Nanjing City Card (with T-Union mark)
•  Suzhou Citizen Card
•  Shanghai Public Transportation Card (Purple card and T-Union card)
•  Kunshan Citizen Card
•  Guangzhou Yang Cheng Tong (CPU card only)
•  Lingnan Pass
•  Shenzhen Tong (FeliCa type not supported)
•  Chengdu Tianfu Tong (CPU card only)
•  Other T-Union or City Union cards issued across China (some dual-module cards may show T-Union history only)
Note: Student cards, senior cards etc. are not supported. 
This app does not have access to official database. Please use with caution and do not rely on the result.