By default, Clientary will round time entries to the next 15 minute increment. This default suitable for most industries but you may have a situation where your billing policy requires a different rounding setting or a situation where your business bills down to the individual minute.
You can adjust the rounding preference under the Account page in the sub-section titled "Project & Time Tracking Preferences". There are various options for this including "No rounding" which will retain your time entries to the minute.