I just installed my Rachio and so far pleased with the hardware, but somewhat disappointed in the programming options. Almost all standard controllers have the option to schedule multiple start times per day. As with many users, I live in AZ where multiple short watering periods per day are required. I did see the IFTTT work-around, but hourly is quite an overkill, and unfortunately there are no other multiple day timer triggers.
I did a search on the community forum for “multiple start times” and noted that the first request for the feature was made back in December of 2015. It was then addressed by Rachio support in July of this year, where there was mention of it being integrated in the next software release. I’m hoping support can give a more specific response in when they plan on addressing this issue.