Mac or iOS Humidity and Temperature Tracking?

[Rivka]

sorry if this has been covered somewhere already, i searched and did not find anything.

Does anyone have recommendations for a Humidity and Temperature Sensor to place in my little greenhouse and log data? Needs to work with Mac or iOS
while i would really prefer something that sent telemetry over wifi (bonus if it sent phone alerts for dangerous readings), i am willing to have it just be something i plug into a usb from time to time.

thanks