We start all over again. You select a sensor size and it’s corresponding CoC.
That something different as selecting a sensor size and selecting a free CoC.
In the above how does the app know that you have a D850???
George
Doesn’t have to know, since @Joanna does not target a specific print size in the first place since nothing is decided when you take photograph (unless it is for a client or a specific purpose), but she targets a sharpness she knows by experience will be ok for the process she could use.
Correct me if I’m wrong Joanna.
It doesn’t need to because, instead of calculating the pixel size from the sensor size divide by the number of pixels, which is what other less sophisticated apps do, it allows the user free choice.
For the umpteenth time, if you don’t know yet know the print size and viewing distance, it would seem there is no way you can use your choice of calculators. On the other hand, TrueDoF-Pro handles it perfectly because blur spot diameter is based solely on pixel size.
Whether you like it or not, it works. But you’ll never know that because I am guessing you don’t have an iPhone or iPad to run TrueDoF-Pro on.
Until you have actually used it and tested it out in real life, you don’t have a valid opinion.
Then it’s simply impossible to calculate dof and hyperfocal distance. They are print dependent.
George
You are absolutely (blur) spot on 
I get the feeling George may only be an amateur photographer who doesn’t print beyond A4 
@JoPoV you see what I mean? Give a man a hammer and everything becomes a nail.
@George then how come all my photos turn out pin sharp at any size I print them at?
Still waiting how you manage to select a sensor size and a coc.
George
Duhhh!, Read the words. You don’t need the sensor size. It is only included, as a convenience, to calculate the pixel pitch from the size divided by the Megapixel count.
@George then how come all my photos turn out pin sharp at any size I print them at?
The question is not if you can photograph and priunt but if you understand the app you’re using.
George
Sorry, you just don’t know the concept of sharpness.
George
if you have enough experience to know what your image in pixel will produce, why to bother with any particular case ?
Maybe you’re not aware but we’re discussing her app. And how she misuses it.
George
And what happens when I crop an image after taking it? Where do all the pixels go? Oh my gosh! all those lost pixels, who’s going to look after them?
What happens to the sensor dimensions when I rotate a cropped part of the image?
Since you have never used it, you don’t have an opinion.
I thought you were framing perfectly your landscape shots !
I am! I am! It’s all those leaking pixels that unbalance things between the camera and the computer 
Wow! And this isn’t even a “Mike thread”
It was good for me to re-read the Cambridge in Color pages again, but this little squabble needs to stop. It is clear you two are talking past one another and no one is budging.
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Maybe it’s good if you try to convince her that there is a sensor size needed to calculate dof and hyperfocal distance.
George
Please show me the formula that includes it.
???
You serious don’t understand it.
A FF sensor has to be enlarged about 8 times. A CoC of 0.03 will become 0.24. That about the minimum a human eye can see at 25cm distance. Simple isn’t it. Just to start with.
George
I asked for the full formula that includes sensor dimensions