Ive tried others, some free and some paid and this one is the only calendar app I use. It has replaced my iCal, my pocket shift calendar, and my wifes calendar all in one. While it does take a little bit to figure out, it is only because there are so many features available on it. It is well worth the hassle of setting it up. I have never had any issues with the app and the developer is very receptive to questions and/or suggestions. I use this app more tan any other app I have ever downloaded. The OT, vacation, and sick time tracking features have saved me a couple of times when HR made a mistake with my hours. That alone paid for itself. I rate it 10/10!
Medic-11 about Scheduler