Before I go asking for help, I just wanted to say that this app is so nice - It helps me keep things organized so thanks so much guys 
So, I’ve browsed through most of the posts regarding sync - so far, none of them worked on me. I tried syncing other programs that require iCloud, hoping that Agenda would sync too. However, It didn’t work, and I’m pretty much stuck here 
Is there any way possible that I’m able to sync Agenda manually?
Make sure you are signed in to iCloud with the same account on each device, and that iCloud Drive is turned on. (iCloud Drive is very important, and many people forget this.)
If that doesn’t help, here are some other things to check: Syncing between desktop and iOS
Lastly, some companies block iCloud, so you might need to check if that is the reason sync is not working for you.