Licensing requirements
You can use Calcite Design System to create beautiful, easy to use, cohesive experiences across apps with minimal effort. Calcite is available with either an ArcGIS Online and/or ArcGIS Location Platform account. If you don't have an account, you can create an ArcGIS Online or ArcGIS Location Platform account for free.
Use of Calcite Design System is subject to the terms of use found in the Esri Master Services Agreement.