Solo offers a free mode, this allows a system to have one user and one device operating without any cost. If you add an additional door or an additional user, you will need to have credits on your system for the additional doors or users to work. Please refer to Data Sheet to learn how credits are applied, the process for adding them to a system, and the different ways they can be purchased either directly through the Solo app or via authorised distribution partners. 6 credits required per door per month.