When comparing Desktop Task Timer vs Clockify, the Slant community recommends Clockify for most people. In the question“What are the best time tracking apps for freelancers?” Clockify is ranked 14th while Desktop Task Timer is ranked 19th.
Specs
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Pros
Pro Light version available
There is a cheaper light version available for those that don't need the full functionality of the app or would like to try it out without spending the more money on the more expensive version.
Pro Export time to CSV
Users can export CSV files from the app to use for billing, etc. Though this does require the non light version.
Pro An internet connection isn't required
Due to the app having no cloud sync there is no need to have an internet connection for the app to run. Everything it does is local to the device.
Pro Sync time across devices using a shared folder
While not necessarily the easiest of options (really more a work around to the apps limited functionality) users can sync the apps files to a shared folder or cloud storage folder in order to have sync'd time across Mac's.
Pro Free version available
Cons
Con Only available for OSX
Can only be used on OSX devices, which is pretty limiting for those that use multiple OS's.
Con Simple Android app
You can only track time in the app, no dashboard or reports. Although It don't seem to be the case with iOS version.
Con Simple Desktop & Linux apps
Limited features, can only track time with no reports or dashboard page. Mac version is better.