Attribution
Scrying Orb is 5E compatible. Its rules come from the System Reference Document, credited here as its licence asks.
SRD 5.2.1
This work includes material from the System Reference Document 5.2.1 ("SRD 5.2.1") by Wizards of the Coast LLC, available at https://www.dndbeyond.com/srd. The SRD 5.2.1 is licensed under the Creative Commons Attribution 4.0 International License, available at https://creativecommons.org/licenses/by/4.0/legalcode.
Changes to the material
The material has been modified. It is restructured into this app's own data, some names and vocabulary are changed, and a table's own rule amendments are layered over it wherever the group has decided to play differently. Text the app generates, such as rules, descriptions and suggestions, may be adapted from it.
Data source
The SRD's text and tables reach the app through the 5e-bits/5e-srd-api project, used under the MIT License. The encounter budget, the experience each character adds to a fight, is taken from the SRD 5.2.1 directly.