For just one thing - the Tesla app is better than the iX app for me - the internal temperature of the car.Having owned a Tesla Model 3 for four years, the keyless phone entry system is glitchier than the iX’s.
It happened at least once a month that the phone key didn’t work as intended and I had to open the app to get the car to detect the phone. Not a big deal but not as seamless as alleged. Go to the car, try to open, doors stay locked, get my phone out, unlock my phone, swipe several times to get to the Tesla app, launch Tesla app, try to open Door again. Annoying.
The iX so far always unlocks when my phone or watch is close. So that’s a usability plus point over the glitchy Tesla system.
And the Tesla also got confused which user profile to load when my spouse was with me.
About the app itself: People often claim that the Tesla app is somehow superior. Why? I rarely used the app for anything other than check on the car’s status and maybe remotely lock/unlock. The BMW app does that just as well.
When I open the Tesla app I can check how hot it is inside the car - 10 minutes before I intend to get in the car and take a drive.
Bearing in mind that I live in a hot country - this is a priceless function for me.
The other day - I parked car for 20 minutes in middle of the day and it was outside in the sun.
Just before I left my meeting - I checked on the app and saw that the inside of my Tesla Model 3 was 62 degrees C (144 degrees F!)
10 minutes of pre-cooling before I got back to the car saved me from a sweaty journey back home!
I wish the iX showed me the inside cabin temperature on the app - hopefully this will come in future software updates.