Been using this app for well over a year... Possibly over 2 years... Cant really remember and too lazy to look it up BUT... I cant live without it! I am a medical student and honestly after learning how to use this app (took a while... I made it too complicated) I am so very very happy with my purchase. Yes there are bugs from time to time but they are usually resolved very quickly and I usually dont even notice them until there is an update addressing the issue. This app has improved tremendously over the time Ive been using it and am a very satisfied customer! I use Apple calendar on my computer to input where and when I need to be somewhere but other than that I use good task for ALL my reminders (including calendars) and to-dos! Just amazing!! Hope it keeps improving (though honestly I like it just the way it is at this very moment)! Disclaimer: I have NO monetary investment or relations to this app or its developer! Just a very happy long time costumer! Will update should things/opinion change!