I have a partner so I am lucky in that his wages pay the rent/utility bills. Plus he is there occasionally to talk to about the kids like "guess what happened at school today?"
He actively takes care of the kids for about 5 hours a week at most. If I'm lucky he night make them a sandwich for lunch once a week. He might once a week, load the dishwasher. For the rest of the whole week I am completely on my own. He used to put the bins out but now that job has fallen to me. ALL of the meals, all of the washing (except his - I refuse to do his), all of the cleaning, all organising if Christmas, birthdays, any school paperwork, any trips out, any disability paperwork (2 disabled kids, tonnes of paperwork), all bedtimes (not kidding!), bathtimes, sorting out car, doctors, dentist. I have to do the loft stuff (thankfully my boy steps up to help. He's under 10 and has been helping since the age of 5 while other half years me huffing and puffing struggling to lift stuff down from the loft or carrying shopping bags up to the flat but hears the 5 year old say me struggling and says "can I help Mummy?"). He will offer to help but it's always on his terms and never when convenient to me. If I don't drive it, it won't get done. Fixing lights that have blown, any DIY, all food shopping. All done by me. I work too (not ft because of kids disabilities, 22 hours a week). Never see him in the evenings for anything meaningful. He's too busy "working".
The only real difference it makes to mine and the kids lives is him paying the living costs of the home. I pay for everything else, insurance, TV licence, food, petrol, kids clothes, birthdays, clubs, Christmas, school trips etc.
Still not as bad as being a single parent but, if he wasn't living with us, from a practical point of view neither me or the kids would notice any difference. I always laugh inside when he informs me he'll be home "late". This means "I won't be home by 8 tonight, I might be home at 1am" like it makes any difference to me whether he's home at 8, 9, 10 or 1am as he's never actually "present" and mucking in.