At Mibex Software, we try to only store the bare minimum of data to accomplish our task and to provide you a pleasant user experience.
This app persists Confluence host details (i.e., client key, host public key and host base URL) required for interoperability with Confluence. Furthermore, we store the LaTeX macros of the app settings in a Postgres database on Heroku. This is necessary because there is currently no possibility to store app settings on the hosted Atlassian product. Note that we do not store any of your math equations.
List of used Confluence REST API endpoints
/rest/api/content - used to get the page in order to render, number and reference math equations
READ: Used to get the math equations in a page to render, number and reference them
Although the data center location of our Heroku application is Europe (i.e., amazon-web-services::eu-west-1), Heroku backups of our Postgres database are stored in the U.S.
As stated before, we only store the absolute minimum of data to make this app work. Nevertheless, you should be aware of this in case your LaTeX macros contain sensitive data which should not be stored in the U.S. Please note again that this only matters for the macros, your math equations are NOT stored.