As of posting this, the Forbes article still contains the beta testing links, but the app launched today on ProductHunt: https://www.producthunt.com/posts/ceasefire
It's available for both iOS and Android:
https://apps.apple.com/app/id1506973446
https://play.google.com/store/apps/details?id=com.ceasefire....
Also accessible via web browser at https://ceasefire.net