Here is a device that lets you measure temperature and humidity of your environment. It connects to your iOS devices and displays data through the Lapka app. The device uses a Honeywell relative humidity sensor. The sensor also shows your temperature in either Fahrenheit or Celsius. You do have the option to save your data. More info is available here.
Also check out:
Disclaimer: *Our articles may contain affiliate links. Please read our disclaimer on how we fund this site. As an Amazon Associate, we earn from qualifying purchases.