From what I can tell, the app takes over the "repeat" function from iCal. If you attempt to set up a customized repeat in Calendar Tools, then the repeat function is no longer visible from i Cal.
The home screen on Calendar Tools lists "events" by date that are taken from iCal. You can filter them according to date or event. You can see either see appointments according to days between two dates you specify, or you can see them according to the type ("x meeting").
From the home screen, you can click on an event ("x" meeting) and then add a "custom recurrence". You can specify 3rd Tuesday of the month; 2nd Friday of the month on a repeat daily/weekly/monthly basis. However, when you click "Done" nothing happens, so you cannot save the custom repeat. In effect, the very feature for which you buy this app does not function.
Also, the app states in the FAQ that you can either add an event in iCal or in Calendar Tools with custom repeats. This is inaccurate on both accounts. If you open up iCal, you get the standard repeat options that comes with it (none, daily, weekly, 2 weeks, monthly, or yearly). If you open up Calendar Tools to add an event, you get the exact same options - no customizable repeats as advertised.
In short, this app is a waste of money - it does not do what it is advertised to do. Dont buy it.
I put in a request to Appiplayer to refund my money. If they are at all reputable and refund my money, or make the fixes to make this app functional the way it is advertised, I will add their response to my review and report the outcome. Its such a crazy thing that getting customized repeats is such an elusive function when it is available so readily on other platforms. Frustrated.