Reports and summaries
For some, this is one of the most important parts of the system.
TimeWarrior has a couple of report modes. The summary command option outputs a summary of total time taken on different tasks. There are quite a few options that can be applied to this, such as limiting the summary to a period or filtering by tag. It also has a graphical text-mode charting option. There is also an extension system that uses Python plugins for the ultimate in custom data processing.
Even on the free tier, TimeCamp has a full set of report features. Many are based on business needs, and can help you with billing by assigning hourly rates for different jobs. There are some helpful charting facilities that help to give an overall view.
Hamster’s report generator is accessed via Export on the main menu. The report encompasses the period specified in the main interface. It is a self-contained HTML file that looks good in itself. It can be customised and a custom template file can be created from the default one, but it’s more work than being able to tweak the report parameters and layout from the GUI.
Arbtt-stats produces the summary for Arbtt. As Arbtt is an automatic system, how detailed this information is depends largely on the amount of work you put into configuring Arbtt. For example, by default, the output shows how much time you have used a program such as Chrome, but you have to configure Arbtt to assign a custom tag to windows that have Google Docs to see how much time you spent with that individual website.
TimeSlotTracker has a well-organised selection of report types, and it has the advantage that it can output to a number of formats such as CSV in addition to fully formatted HTML.