Nothing beats paper at catching a thought. No unlock, no loading, no deciding which app. That is why people who have been through four apps this year keep ending up back at a notebook, and it is not a discipline problem.
The place everything falls down is afterwards. A notebook cannot be searched or sorted. Most apps only store the mess in a different shape. So the useful question is not which app catches thoughts fastest, because they are all fast enough. It is what happens to the pile.
In short
| Option | Capture speed | Sorts the pile | Setup needed | Free tier |
|---|---|---|---|---|
| Paper notebook | Instant | No | None | n/a |
| Apple Notes | Lock screen | No | None | Included |
| Polishr | Photo or voice | Yes, into set shapes | None | Yes |
| Google Keep | Very fast | Manual labels | None | Yes |
| Obsidian | Fast once open | You build it | Substantial | Yes |
| Notion | Slowest to open | You build it | Substantial | Yes |
| Todoist | Very fast | Tasks only | Light | Yes |
| Evernote | Fast | Manual, strong search | Light | Limited |
Search this and page one is mostly discussion threads rather than product pages, which usually means nothing has answered the question well. Reading the r/ADHD threads, the same few things repeat.
People want sorting, not catching:
“helps me organize sudden thoughts and rumination. I don’t care about ‘mental well-being check-ins’”
r/ADHD
And apps keep losing outright to paper:
“Honestly I find apps much too fiddly for a brain dump. A small notebook is the way for me.”
r/adhdwomen
The clearest signal is a post on r/SomebodyMakeThis written as a wish rather than a recommendation: “An ADHD app that lets you brain dump all your thoughts to automatically organize them.” The request is not for a better text box.
01
The fastest capture there is, and the only one that never updates, never notifies and never needs charging. You can draw in it, and an arrow often says the thing better than a sentence.
It stops dead at search. Nothing written in March is findable in June.
Best for: catching thoughts. Nothing comes close.
02
Free, already installed, and reachable from the lock screen once set up. Apple's Notes guide covers the scanning and search features, and iPhone's Live Text reads printed handwriting straight from the camera.
It does not sort. A long note stays a long note; a hundred notes stay a list.
Best for: the default that is genuinely hard to beat on an iPhone.
03
Built for the second half rather than the first. You photograph a page you already wrote, speak, or paste the mess in, and it returns it with a shape: clean notes, bullet points, a table, action items, flashcards, a slide outline or an email draft. Changes are asked for in plain words, and everything files into collections.
It is not the fastest way to catch a thought, and does not try to be. Paper and Apple Notes both beat it there. It also needs a connection, and it is iPhone only.
Best for: the pile, once you have one.
04
Fast, free, identical on a phone and in a browser. Colours and labels give rough sorting without building a system first.
Past a few hundred notes it gets unwieldy, and the labelling stays manual.
Best for: quick capture across Android, iPhone and desktop.
05
Named more than anything else in those threads. Plain text files on your own machine, and links between notes that get genuinely powerful at scale. The documentation is excellent.
It expects you to build the system first. People who bounce off it almost always bounce during setup, and setup is exactly what a bad day cannot support.
Best for: people who enjoy building the system and will maintain it.
06
Can be shaped into almost anything, which is the appeal and the trap. Building it is a project, and tweaking it is more interesting than using it. Also the slowest on this list to open, which matters when the point is catching something.
Best for: structured work you return to, not catching a thought in a queue.
07
Quick add is genuinely fast and reads dates out of plain language, so “call the dentist Friday” lands without a date picker.
It is a task manager, so everything becomes a task. Half a brain dump is not tasks, and ideas sitting in a to-do list read as a list of failures.
Best for: the part of the dump that really is actions.
08
Long-standing, strong search, and it has read text inside images for years, so photographed pages stay findable. The free tier has tightened considerably.
Best for: a long archive you search rather than browse.
The pattern in those threads is not that people picked the wrong app. It is that they picked a system that only works on good days. A version that survives a bad one looks like this.
| What is in the dump | Where it goes | When |
|---|---|---|
| Something that must happen | Task list, with a date | Weekly pass |
| An idea worth keeping | Notes, filed once | Weekly pass |
| A worry, already out of your head | Nowhere. Leave it. | Never |
| Anything still unclear | Back in the pile | Next week |
Judging by how often it is recommended in ADHD communities, it helps a lot of people. Being honest about the evidence: there is no clinical research specific to brain dumping that stands up to checking. What can be said is practical. Writing something down means no longer holding it, and the threads are full of people saying that is the part that helps.
Plan each day as one big task, three medium ones and five small ones. Nine items, decided in advance, so the list has a ceiling. It comes from Alex Cavoulacos at The Muse as general productivity advice rather than anything ADHD-specific, and ADHD communities adopted it because a capped list is harder to abandon than an open one. It pairs with a brain dump: dump everything, then pull exactly nine things out.
Wait a full day before acting on an impulse, usually a purchase. ADHD UK suggests saving the thing to a list, basket or email to yourself and revisiting it tomorrow, and the same idea is used for big decisions, not just spending. A brain dump is a natural place to park the thing while the day passes.
Nobody publishes numbers worth quoting, so anyone who names one is guessing. What can be observed is what gets recommended, and in the threads that is mostly general-purpose software: Obsidian, Google Keep, Notion, Evernote and Todoist, rather than anything built for ADHD specifically.
Partly. Several, including Polishr, take messy text and return it as bullet points, a table or a list of actions. What none can do is know which of it matters to you. The sorting can be automatic; the deciding cannot.
Yes. Photograph the page, ask it to tidy the text, and it does a decent job. It is general-purpose, so the instruction gets rewritten every time and it has no memory of last month's notes, no collections and no search across them. Fine for one page, tiring for an ongoing pile.
For catching a thought, yes, and it is not close. For finding it six months later, no. The two halves have different winners, which is why using both beats committing to one.
The notes app already on your phone, because it is free, instant and will not be abandoned in three weeks. Apple Notes on an iPhone, Google Keep anywhere else.
Usually because the app asked for setup, and the setup was done on a good day by someone who would need it on a bad one. The tools that survive need no configuration.
For the pile, not the capture
Photograph the page, speak it, or paste the mess in. Polishr gives it back with a shape: bullet points, action items, a table. Then it files it somewhere you can find it again.
Try Polishr freeiPhone. Free to start, then $9.99/month or $99.99/year.
Sources and notes. Quotes are from public discussion threads on r/ADHD, r/adhdwomen and r/SomebodyMakeThis, quoted as search results display them. App capabilities are as documented by each maker in October 2026 and change often; nothing here was independently benchmarked. Polishr is not yet released on the App Store.