Two houses, two sets of rules, and a kid who has learned the difference by Tuesday. Trying to make the phone rules identical in both places usually breaks the first time one house has a different Wi-Fi password. Fit the rules to the two homes instead, and keep the handful that actually matter the same.

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Sort the rules into two piles

Write down every phone rule your family has, then split the list. The first pile is the core: no phones at the dinner table, nothing after an agreed hour at night, no messaging with people a child doesn't know, and who pays for a broken screen. The second pile is household style: how long a game runs, whether a tablet comes out in the car, and what counts as homework time. The core should match in both houses. The style can differ, and it will.

Write the core down in one place

Put the core list in the handoff note, on the fridge in both kitchens, or in a shared file both adults can open. The point is that when a child says Dad lets me, the answer is already written down and doesn't depend on which adult is tired. Keep it to a short list you can read in a minute.

Let the kid carry the difference

Children move between houses constantly and handle it well when they know the rules before they arrive. Tell them plainly that the two houses are different, and name the two or three things that are the same everywhere. Kids can manage different bedtimes, different snacks, and different game limits. They struggle when rules change without warning or when the difference is never explained.

Check the core once a month

Once a month, ask each child to name the core rules in their own words. If they can, the rules are working. If the answers differ, the list needs a clearer sentence, not a longer one. Update the list, not the fight.

If you want a steady frame for weekly routines that cross houses, Start Here: The Reading Order points you to the pieces in sequence.