Ecotech and AI do not have WiFi control. They have Bluetooth control and you have to be near them to control them in any way.
I personally think this is a positive though. You shouldn’t be making big changes remotely.
My last tank had a ton of Apex on it and it all worked great for me. Trident controlled dosing for over a year, LLS sensors on multiple things, dual pH probes, many others accessories. However, it was a full time hobby just to maintain all that equipment. Refilling reagents, calibrating probes, double checking trident accuracy, etc etc
My brand new system will not have a controller to start or likely ever. I went with a monitoring only setup and chose the Hydros XS. That way I can monitor temperature remotely, monitor for leaks, monitor sump level and monitor ATO reservoir level. I don’t need any of that being controlled by a controller. My heater is on an Aqua Logic heater controller. One of the best in the hobby.
So do you NEED a controller? Likely not.