Nowadays, almost every smartphone has an optical zoom. Using digital zoom is rarely justified. Unfortunately, I haven't encountered any photo apps that allow the user to set the maximum zoom. This would be much more convenient than constantly checking whether the zoom value is set higher than the optical one.
Alternatively, some photo apps use discrete presets that allow you to set the desired zoom with a single tap. If the user is lucky, one of these presets will correspond to their maximum optical zoom.
This doesn't eliminate the need for a precise zoom value between the extreme values of the optical zoom, but it applies specifically to situations where you need the extreme value without turning the photo into a blur with software oversizing.
Nowadays, almost every smartphone has an optical zoom. Using digital zoom is rarely justified. Unfortunately, I haven't encountered any photo apps that allow the user to set the maximum zoom. This would be much more convenient than constantly checking whether the zoom value is set higher than the optical one.
Alternatively, some photo apps use discrete presets that allow you to set the desired zoom with a single tap. If the user is lucky, one of these presets will correspond to their maximum optical zoom.
This doesn't eliminate the need for a precise zoom value between the extreme values of the optical zoom, but it applies specifically to situations where you need the extreme value without turning the photo into a blur with software oversizing.