Timeless Time & Expense will round timer entries to 1, 3, 5, 6, 10, 15, 30 or 60 minute intervals.
To change the rounding interval used, go to the Time Entry Options by selecting Options from the Tools menu. Select the Time Entries tab and change the Round Time selection.
Timeless Time & Expense will round the start and end times either up or down depending on which is closer. It does not round the total time of the entry.