I'm not sure how long I've been using this app but i see below that I wrote a MacUpdate comment nine years ago, so it's been at least nine years. This is one fine app, I use it constantly every day, logging in and out of different tasks with almost zero effort. The summaries are great. You define tasks and sessions within a project. I suppose I use it a little oddly, where "project" = "life" and tasks are different things I do during the day or year--these would logically be called projects. I start a new session for each task that I engage in per day. Summaries let me see totals by day, week, year, last week, last month, etc., jut by clicking a tab button. You can set different hourly rates if that concerns you. I mostly use if for personal timekeeping so my rates are $0.00/hr. :-/ I love this app. It matches my needs perfectly and each January 1 I start a new "project." I want to leave a five-star review but the new MacUpdate review system is jut awful so I'll just leave this comment.