I initially built this one for myself. When working from home and with multiple clients, I had to manually add my appointments so that my colleagues wouldn't accidentally book that time. After a while, it just became tedious and I decided to build this out.<p>I think this will be useful for anyone working with multiple calendars and also service providers who manage appointments through calendars.<p>Looking forward for your feedback!<p>Also, appreciate any inputs on the pricing, ideally I would prefer this to have it as a buy once software, but I'm afraid the APIs would evolve and that would need continued work on my side.