I have Minut. I don’t subscribe. I can set a noise threshold & it will alert me. I can even say how long the noise is at a certain decibel before I want notification.
It also has a crowd filter based on the number of devices.
It has a lot of features. I love it! W/o the subscription I can’t see history very far back but I don’t care about that personally. I’m looking for “happening now” data.
