A week your team actually signs
Timers produce guesses. TackTime produces statements: your team fills a clean weekly grid, closes each day, and submits a week they have actually reviewed. A late entry carries a written reason, set by your policy. The result is a timesheet someone stood behind, which is what an invoice dispute or an audit will ask for.
Approvals that route themselves
A consultant's week might span three clients and three project managers. In most tools one approver holds up the whole timesheet. TackTime is designed so that each project's hours route independently to that project's manager, so nobody waits on somebody else's project.
A history that is added to, never written over
Every change to every record is kept: what changed, who changed it, and when. A correction adds to the record instead of replacing it, and where your timekeeping controls apply it carries the reason as well. When a number is challenged two years later, you answer with the record, not with memory.
Numbers stay with the people cleared to see them
Billing rates and internal labor costs are separate permissions, enforced on the server for every request. Someone not cleared to see a rate is never sent one: the server withholds the field, so it is an access rule, not a hidden column.