Yes you can run the HCalory (and the Vevor as well) in three modes.
1) You set the power level and it stays there regardless of temp
2) It will regulate the power level depending on the temp but it never shuts down, if the temp gets above the setpoint it throttles back the power to level 1 but it never completely shuts down.
3) Full thermostat mode where the unit shuts itself all the way down and kicks back on depending on temperature
Here is the Amazon description of the Hcalory I bought:
8KW Diesel Heater, 5L Toolbox Compact 2S Portable Diesel Air Heater 110V/12/24V All in One Fast Heating with App Control, Altitude Mode and no tick for RV Garage Camper 2025 Upgraded