People with ADHD often describe a kind of object permanence problem with tasks. If something is not visible, it is functionally gone. The friend you meant to text, the bill, the project you were excited about on Monday: all of it vanishes the second it is off the screen, then reappears as panic when it becomes urgent.
You cannot fix this by trying harder to remember. You fix it by building a memory outside your head that is reliable enough to trust.
What an external memory actually has to do
For an external memory to work for an ADHD brain, it has to do three things. It has to be effortless to add to, or you will not use it. It has to hold the context, not just a one-line title, so that when a thread comes back you are not staring at "call them" with no idea who or why. And it has to reach back out to you, because a memory you have to remember to check is not solving the core problem.
That third part is the one most tools miss. A note app holds things, but it waits silently. The whole point is to not have to remember to look.
Capture, context, and resurfacing
The loop is straightforward once you name it. Capture instantly, in a second, before the thought is gone. Let context accrue automatically: the customer, the people, the activity history, the notes, so the memory is richer than your own would have been. And let the system surface the right things at the right time: what is due, what is overdue, what you asked to see again today. If your head is already overflowing, start with a full brain dump and triage after.
Done well, this changes the felt experience of having a lot going on. Instead of a low background hum of "I know I am forgetting something," you get a quiet, current picture of what actually needs you, and permission to let the rest go because you know it will come back.
That is the entire idea behind ADHD Notes: your head, but quieter. See the approach.