They get to the job and sign in with a badge number and a PIN. No email address. No account to create, no password to forget, no IT ticket from a jobsite.
They put in what they worked on — against the job, against the cost code — while they're standing in it. If they move to a second job after lunch, that gets captured when it happens, not remembered four days later.
At the end of the day they're done. Nothing to hand in, nothing to hang onto, nobody to text.
That's the entire ask. Any more than that and it doesn't get done — which is exactly why it isn't any more than that.