See all your tracked time and durations in reports in decimal format instead of clock format. Plus, enter time in Timesheet using decimals (eg. if you type 1, it will be transformed to 1.0h).
Customizing exports is an extra feature, which you can enable by upgrading your workspace to Premium or Enterprise plan.
You can try out the feature for free by activating the free 7-day trial (no credit card required)