Recommend "basic" wifi moisture sensor?

I have only found one such device (Verdmo) and I can find no information other than at the company’s website.

I am not looking to connect anything to the Rachio controller, I just want to be able to know remotely when I need to water. I have given up trying to get lawn watering sorted using the advanced settings.

Anyone know of one?

Following as I am also considering the Verdmo moisture sensor.