So now here you go again speaking for all “professional architects”. You cannot possibly try to make such claims for all architects, unless you are the only professional architect on the planet. Which obviously is not the case. So it is not a fact, it’s simply your opinion. And the burden of evidence falls on you, because you are making the claim there are no architecture apps on the iPad, and I have demonstrated there are such apps on the iPad. You made a false claim, and rather than admit that you’re wrong, and cannot possibly make such a claim, you’ve dug in your heels.