Hello @Rafael Marin
Welcome to the Atlassian community
Are your users using the native Log Work function to log time against work items?
If not, how do they record in Jira their time spent doing work?
Jira natively supports users recording time spent on work items. They can specify the date the time was worked and the duration. The can make multiple such entries per work item.
Jira does not natively provide ways to report the time logged per user. It supports only reporting total time logged against work items. It also does not support specifying a date range to apply against the date the time was worked.
To get features like that will require an app either from the marketplace or one you develop yourself.
Here is a sample search for such apps from the marketplace. https://marketplace.atlassian.com/search?query=time%20tracking%20reporting%20jira
You will need to review them or adjust the search to find the ones that are free.
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