Your to-do list doesn't know what time it is
A to-do list tells you what. It says nothing about when, or whether the when is even possible. For a brain that already struggles to feel time passing, that missing half is the whole problem.
Time blindness is the ADHD trait of not sensing time the way it's usually described to you. Ten minutes and an hour can feel the same from the inside. A deadline two weeks out doesn't register as approaching until it's tomorrow. You're not careless about time. You genuinely can't feel it moving, so you can't plan against it.
A plain list makes that worse, even though it looks tidy. Eight tasks sit there in a column, each one a single line, each one taking up the same amount of space on the page. So they feel like they'll take the same amount of space in your day. They won't. One is a two-minute reply, one is a three-hour project, and the list draws them identically. You say yes to all eight before lunch because nothing on the page shows you that the day is already full.
The day is a container, not a column
Here's the part the list leaves out: your day is finite. It has edges. There are only so many hours, and some of them are already spoken for by a commute, a meeting, dinner, sleep.
A list pretends the day is an empty column you can keep adding rows to. A real day is a container that's mostly already packed. Those are very different shapes, and if you can't feel time, you need to see the right one. You need your tasks laid against the hours they'd actually occupy, with the meetings and the travel already taking up their real room, so that "I'll do all of this today" either looks possible or visibly doesn't.
Putting time back on the page
That's what Willow does instead of handing you a list. It places each task and habit at a real time, on a real timeline, around your calendar and your travel time. You're not estimating in your head how long things take and whether they'll fit. The fit is drawn for you. If the day can't hold everything, you can see that before the day starts, not at 9pm when it's already gone.
It won't make you feel time the way other people do. Nothing can. But it can stop your planning from depending on a sense you don't have, and put the hours where your eyes can find them.
A list asks you to remember how time works. Willow just shows you.