We currently only develop apps for Atlassian Server and Data Center products. Any data saved by the app, will be stored on your own databases as configured in your Jira instance. We do not collect, store or share any other data.
Do you have a Jira plugin tutorial that can be used on this site? Please do share it with me and I can add it along with the ones available.
Your feedback can help improve the content on this site. If you have anything that you would like me to change/implement on the site.