In repro.io and repro.io subdomains, cookies are used to hold values such as analysis of usage situation for function improvement, language setting of UI, etc. The name and purpose of the cookie used are as follows.
| Cookie name | Domain | Use |
| __ga | - | Collect usage situation |
| NID | gstatic.com | Memory settings of users and other information |
| intercom - | .repro.io | Provide widgets for customer support |
| intercom -session- | .repro.io | Provide widgets for customer support |
| current_app | app.repro.io | UI setting information of the management screen |
| _repro_rails_session | app.repro.io | Management of login session |
| categories_expanded | app.repro.io | UI setting information of the management screen |
| language | docs.repro.io | Screen language setting information |