With BipReader you can get the balance of your bip card immediately and without any kind of lag. Just init the app, and tap the card with your device!

WARNING: This app is intended to be used by Transantiago or Metro users, in Santiago, Chile. In any other place, and without a bip card, is USELESS. The app is only compatible with devices that have NFC and hardware that supports bip card reading. Using this app on non-compatible devices can result in a limited or null functionality. This app is not developed by Transantiago and it has not any relation with this entity or another related.