Street complete may be a bit more beginner friendly but if you just need to update hours or want to add details to several stores quickly everydoor is easier to me
Worth taking a look at Street Complete Extended Edition too: https://f-droid.org/packages/de.westnordost.streetcomplete.e...
You can do it directly in Organic Maps as well.
On iOS https://every-door.app/ wins for easiest `opening_hours` editor.
And by far the easiest way to do this, if you have an Android phone, is to use the beautiful StreetComplete app: https://github.com/streetcomplete/StreetComplete/#readme