In some apps, you need to go through a number of steps. Of course, a back button is needed in this process, in case the user has made a mistake or changes his mind.
But my question is, what is the best place for this back button?
Since the top left is pretty standard for most apps, this makes it recognizable for the user and therefore easier to find and use. This position is only difficult to reach for mobile devices.
That is why the bottom left would also be possible, but the most important option like a next button is at the bottom. In addition, it is also important that the back button is in the same position throughout the app.
What is your vision?