Quick verdict
The IKEA Timmerflotte is hard to beat on price for a glanceable Matter temp/humidity readout. You'll need a Thread border router, and it's slow to update so don't use it for tight HVAC loops, but for ambient awareness it's excellent value.
Standout: Cheap Matter-over-Thread temp + humidity sensor with a built-in E-ink display, readable without an app.
Last checked: 2026-05-23