TopTracker provides a straight-forward, free time tracking utility that works on both Windows and OS X. The utility allows commenting on each session tracked (e.g., words written during that session). It also allows export via CSV, from where numbers can be crunched further in Excel to see how well progress is going.
By default, TopTracker will upload screenshots periodically while it’s running, but this feature can be disabled and other elements customized in the program’s settings.
For other similar utilities, see the Zapier blog. For additional discussion of the value of tracking writing progress or other “deep work,” see Paul Silvia’s book How to Write a Lot or Cal Newport’s Deep Work.
Disclaimer: The views expressed on this site are my own and do not necessarily reflect those of any other person(s) or institution(s).
Disclosure of Material Connection: Some of the links in the content above may be “affiliate links.” I only recommend products or services I genuinely believe will add value to you as a reader. But if you click one of these links and purchase the item, I will receive an affiliate commission from the seller at no additional cost to you. Consequently, I am disclosing this affiliate status in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising.”