Not sure what to do. Ex husband threating to take me back to court.

Might be a long post and thank you for reading.. So we've been divorced for a month. Havnt even gotten the transcript in yet to get our certificate but signed papers at our trial a month ago. Custody is 70/30 primary residence is myself. We have 3 kids. He has a bad past of alcohol and abuse. And still emotionally abusing our kids and myself whenever he can. Anyway. I kindly asked him through text to switch a weekend due to work related. I didnt do it trough app because he won't get it (court order). He responds saying he needs 2 things first. One of them was to drop the (paying an app to coparent and schedule) he wasnt going to tell me the second until I agreed to the first. I told him to forget I asked. He then says "The AP is more important to you than adequate, sensible, and agreeable time with the kids" and then proceeds to threaten me and to take me back to court? I have this app to coparent for this exact reason. He hasnt gotten it yet when its in our divorce decree. And our attorney has reached out to him. The kids attorny myself and him all signed it agreeing to use and app for communication/scheduling. I suggested it because again with texting he does this. Im so exhausted from the gaslighting and manipulating. It's $100 a year. Not asking much. He then says that that money can be the difference in where I live vs he lives. (He rents a 4bd home, I rent a 3bd townhouse processes of buying a home) so he just put me down. Im just tired of him. Any advice. Or positive things. Thank you.