I have also integrated Asana with TimeDoctor and Hubstaff. I gave up on Time Doctor, because the synchronization took too long in the use case of adding a task in Asana and then immediately starting a timer in TimeDoctor. This has improved since TimeDoctor updated its UI some months ago. Hubstaff synchronizes right away and integration of Asana tasks into Hubstaff has worked consistently for me over about four years of use. Hubstaff has task management too, but has not lured me away from Asana 
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