Con la aplicacion oficial de FTS podes:
-Ver tu carnet digital
-Ver tu historial de pagos y reservas
-Reservar clases
-Ver tu estado de socio

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.