I’ve relied on Toms Project Timers mentioned here for years, don’t know what I would do without it. Takes a bit of understanding to define the ‘sniff’ terms but I can get it to track the main Rhino modeling, rendering in another app, time spent on Skype with the client, time spent composing and reading pertinent emails about a project, Photoshop time editing renders, creating PDF’s and a host of other functions. It is all how you set up the ‘sniff words’.