The en suite question
The bigger room with its own bathroom should pay more, and the argument is always about how much. A common answer is about 20% extra weight for a private bathroom and 5% for a walk-in closet, on top of the size difference, with the shared spaces split evenly. In a two-bedroom flat that usually lands between 55/45 and 60/40.
Questions
What's the fairest way to split rent?
Split the shared spaces (kitchen, living room, hallways) equally per person, because everyone uses them, and split the rest by bedroom size. Then add a premium for things like a private bathroom. Most people land on 30 to 50% for the shared part; 40% is a good start.
How much more should the room with an en suite pay?
A private bathroom usually adds about 20% to that room's weight, on top of any extra size. In a two-bedroom flat that tends to move the split from 50/50 to somewhere around 55/45 or 60/40.
How do we split rent with a couple in one room?
The couple's room pays its share by size like any other, and each of them pays a full per-person share of the shared spaces. Add a partner to a room and Quarters does both.
Do the amounts always add up to the rent?
Yes. Rounding is done so the parts add up exactly to the rent, to the whole unit or to the cent.
What about bills?
Add the monthly bills and they're split equally per person on top of the rent, since usage is hard to pin to one room.
Is it free? What do you store?
Free, no account. Your flat stays on this device and in the share link, so everyone can open the same split on their own phone.