How accurate are smart meat thermometers really?

High-trust expert coverage and r/smoking testers report that the Thermapen ONE, ThermoPop 2, and MEATER Plus internal probes track within roughly a degree of reference. The recurring complaint across r/BBQ and r/smoking is ambient-temperature accuracy on wireless probes — the sensor sits close to the meat surface and reads lower than the actual pit temp, so a dedicated pit probe or smoker controller is still the better source for chamber temperature.