The user account fee gives you access to the platform as well as an unlimited amount of shared devices.
If your organisation has e.g. a CityProbe network, they can give you access to all the devices free of charge.
In addition, three 3rd party devices are included in the CityFlow account, meaning you can experiment with your own devices before adding your entire fleet to the platform. Once you are ready to add more devices, you simply add them at a fixed price of 3 EUR per month / device.