I have been using this app for about a year and a half, maybe more? It’s the first true calendar to alarm app. iOS has a lot of challenges for developers or something, because i tried many of alarm apps. They didn’t work. Apple’s “ecosystem” myst be too restrictive. This works for all of my iOS calendars, though I didn’t know my corporate bosses could block access. I know i can only use apple or outlook for work emails, not other email options, but since apple mail/calendar sync is allowed, i haven’t had the problem the other reviewer mentioned. This is something i wish Apple would allow as a calendar setting, and every apple fanboy (without ADHD) will tell you there are “alerts” for that, which go in the same bucket as every other notification on your device, can easily be silenced by DND. This app works. I don’t miss doctor’s appts anymore. I don’t miss meetings. If it’s in my calendar, my alarm goes off. I will set other alarms too like driving time, or “time to get ready”. When i started, you had to manually set alarms and that was kinda neat, unless i forgot. Now the developer automated that too. Seriously, this app is one of the best kept secrets in the app store. I hope apple doesn’t find out and block it. Seriously, i think it only works since it uses apple’s “shortcuts” which i think has more access than just an app. This issue had me considering leaving the apple ecosystem completely (aaand i guess i may be one of those fanboys since i have an ipad pro, iphone, airpods, macbook air, macbook mini, macbook pro and have had many others for about 15 years). But seriously, i can’t say enough good things about this app. More than worth the tiny cost for this. Highly highly recommend.