Morloth most people I know working ft spend all their out of hours time staring at work messages on their iPhone!
Plenty of time spent in my job waiting for a mahosive model to open, quick check of phone. Waiting for a huge report to print out. Check phone. Waiting for a report to comvert to PDF. Eat lunch at desk, quick check of phone and take 10 mins to sort out a bill or some kind of life admin.
My working hours are so unpredictable. Some weeks I leave every day at 7, then I'll have a bad run and be in the office until 1 or 2 am for several days/weeks. And I have v little control over my workload so I can't plan for an easy day.