The app adds functionality to display scrum sprint/kanban velocities on your Jira dashboard.
In addition to being able to track sprint/kanban velocities, gadgets also add the ability to track individual user velocity. In the case of the kanban board, you can specify intervals to show reports for (e.g. 2 weeks) and the start of intervals and it works exactly like scrum.
There are 4 types of dashboard items available:
Velocity report (bar chart) - shows the selected number of sprint/interval velocity reports together with sprint/interval average report.
Individual velocity report (bar charts grouped by assignee) - shows velocity reports by the assignee with the ability to expand each assignee report by sprint/interval (assignee on root).
Individual velocity report (bar charts grouped by sprint/interval) - shows velocity reports by sprint/interval with the ability to expand each sprint/interval by assignee (sprint/interval on root).
Velocity report (line chart) - shows a line chart with the ability to select which data is shown. So this chart can be configured to show either individual velocity reports or sprint/interval velocity reports.
Note, that these velocity reports include finally committed issues, which differs from the built-in Jira velocity report, which shows initially committed issues. Finally committed issues include issues after mid-sprint removals/additions.