The best Android calendar app for power users. However, since a year or so, it freezes with almost every use, making it practically impossible to use. Not sure if this is a widespread problem or just me. Support has been responsive and has tried to reproduce the problem, but in vain. The option of sending a logfile for analysis is unfortunately not available. A pity, as it is a great app; I still haven't found any other remotely as good as this one.