Does anyone have a recommendation for a wireless thermometer that I can put in my hoophouse and monitor from my computer/smartphone in my house?

Henderman,

Ours have a unit that sits in the kitchen window but isn't hooked to the phone. Ours are about 8 years old, so I'm not sure. I have our security cameras on the phone so my space it limited. Just added the garage door too.

I have been using a ThermoPro Wireless Thermometer / Hygrometer for a few years, for indoor outdoor temperatures ...

Recently I needed to replace the outdoor sensor ....and purchased the ThermoPro Wireless Weather Station + a new sensor ...

newer models have Bluetooth and WiFi

the reviews are mixed online ... for my use, a "few degrees off local weather reports", "not accurate" or "close" ...is good enough ...

https://buythermopro.com/

available on Amazon