This app was mentioned in 1 comment, with an average of 1.00 upvote
It's going to be hard. You try reason with yourself that you should contact them, there will be happy ending even if not getting back together and all the feelings you have now will go away. It won't. It will make you worse and prolong your hurt. Being nocontact is what will make you feel better as it will stop giving you updates adding more fuel to your fire.
There is an app on Android for nocontact. It's very basic but its good if you get weak and need reminding - https://play.google.com/store/apps/details?id=com.hardy.nocontact