With the spusu app you have all important data of your fare at a glance. It shows all the units consumed and cost limits are clearly listed, which can be easily adapted to the individual requirements at any time. The app also provides the ability quickly and easily set up a call forwarding and configure your voicebox to your taste. Features at a glance:   - Cost control   - Overview of the available free units   - Set up call forwarding pay app   - Configuration of the mailbox on the individual needs.   - Charging of the prepaid card via QR Code