Show HN: Subnet CIDR Coverage Calculator

This is for a niche problem I was having, on the app's page I've tried to make it simple and clear why it's useful, otherwise I've tried to explain in a blog post [1]. Github repo [2].

[1] https://matthewkindzerske.com/2021/01/26/subnet-cidr-coverag...

[2] https://github.com/yamori/cidrizer