The best apps for capturing random thoughts in 2026
Most roundups of this kind rank apps by features. That is the wrong test for a random thought, because a random thought does not arrive when you are sitting at a desk deciding which app deserves it. It arrives in the shower, on a walk, mid-argument, half-asleep. So this list judges six apps on two questions only: how little does it ask of you in the three seconds you have, and will you ever see the thought again.
We make one of the six. That is disclosed at the top rather than buried, and Corteks is last, described with what it does badly as well as what it does well. Everything else here is a genuinely good app that a lot of people should use instead of ours.
Apple Notes: the one you already have
Free, on every Apple device, and the honest default. It is faster than people expect: a Lock Screen or Control Centre shortcut opens a new note without unlocking, and it handles typed text, scanned documents and photos in one place. If you have an iPhone, you already have a capture app, and adding a second one is a real cost you should be sure about paying.
The weakness is not capture. It is the pile. Notes has folders, tags and search, and every one of those is something you operate. Six months in, the untitled notes outnumber the titled ones, and the thought you are trying to find is the one you cannot describe well enough to search for. Notes is excellent at keeping things and indifferent about giving them back.
It is also Apple only. The iCloud web version exists and is not a serious substitute, and there is no Android app at all.
Google Keep: the fastest one that works everywhere
Free, and the closest thing to a universal quick-capture tool. It runs on Android, iOS and the web equally well, opens almost instantly, and the coloured card grid means a short note is visible at a glance instead of hidden behind a title. If you move between an Android phone and a work laptop, Keep is the one that does not care.
The trade is depth. Keep is built for short things: a list, a reminder, an address, a sentence. A long spoken thought is not what it is for, and its organisation stops at labels and colours, which puts you back in the same position as Notes with fewer tools. Keep is the best in this list at getting a thought in. It is the least interested in what the thought was about.
Drafts: for people who want the capture to trigger something
Drafts opens directly into a blank cursor, which sounds trivial and is not. Every other app on this list makes you land somewhere and then choose to write; Drafts assumes writing is why you opened it. Capture comes from Siri, a widget, the share sheet or dictation, and the free tier covers unlimited drafts, editing, sync and the actions that ship with the app.
Drafts Pro is $1.99 a month or $19.99 a year, one subscription covering iPhone, iPad, Mac and Apple Watch, and it unlocks the part people actually stay for: building your own actions, so a captured thought can be sent onward to a task manager, a note, an email, wherever it belongs.
That is also the catch. Drafts is a superb inbox and it is explicit that a draft is meant to move on somewhere. The routing is yours to design. If you want an app that decides where things go, this is the opposite of that by philosophy, not by omission.
Voice Memos: the one with no interface at all
Free, on the phone already, and unbeatable on the only metric that matters at 2am: you press one button and talk. No app to choose, no field to focus, no decision. On recent iPhones it will transcribe the recording too, so the words become searchable text rather than an audio file you will never scrub through.
Then the problem arrives, and everyone who has tried this knows it. Forty-one recordings called New Recording 41. Transcription makes them searchable, which helps only if you remember a distinctive word you said. Nothing groups them, nothing titles them, and nothing tells you that the idea in recording 12 is the same one you had again in recording 30. It is the lowest-friction capture on this list and the highest-friction retrieval.
Obsidian: for the people who will actually maintain it
Obsidian is free for personal use, in its own words "free without limits, no sign-up required", with optional Sync at $4 per month billed annually or $5 monthly, and Publish at $8 annually or $10 monthly. Your notes are plain files on your own disk. The plugin ecosystem is enormous, the linking model is genuinely powerful, and the graph view showing how your notes connect is the real thing that other apps imitate.
It is on this list because a lot of people capture into it, and it deserves to be. But be honest with yourself about the shape of the work. Obsidian rewards a system, and a system is something you build and then keep. Links are yours to make. Structure is yours to design. For someone who enjoys that, nothing else comes close. For someone who wants to think out loud and never tend anything, it is a second job.
Every app here solves getting the thought in. Almost none of them solve getting it back.
What the list actually shows
Read those five together and a pattern falls out. Capture is a solved problem. It has been solved for years, several times over, and mostly for free. Apple Notes, Keep and Voice Memos are all excellent at the three seconds.
What none of them do is the part after. Every one of them hands the pile back to you exactly as you left it, and every one of them expects you to be the filing system. That works for a week. At three hundred thoughts it does not, and the failure is quiet: you never notice the ideas you did not retrieve, because not remembering something is invisible from the inside. The app looks like it is working right up until you realise you have not opened it in a month.
So if you are choosing from this list and you know you will maintain a system, take Obsidian. If you want the fastest thing that works on any device, take Keep. If you are on an iPhone and want no new apps, Apple Notes with a Lock Screen shortcut is a perfectly good answer and costs nothing.
If the part you keep failing at is the second half, that is the problem we built for.
Corteks: capture with nothing to file
You say the thought out loud, or type it, or send it a screenshot. That is the whole interaction. The AI writes the title and the summary, decides what it is about, and places it, so there is no folder to pick and nothing to name at the moment you have the least attention to spare.
The half this article says almost nobody solves is the reason it exists. Every Sunday Corteks reads your own thinking back to you: what you returned to, what you have been circling, the question you have asked four times without noticing. You can also just ask it things, and the answers come from what you actually wrote rather than from the internet.
Where it is not the right choice, plainly. It is iPhone only. It needs a connection, because the reading and the filing happen on a server rather than on your phone. It is a paid app after the trial, at $9.99 a month or $79.99 a year, which is more than free and more than most of this list. And it is the newest and least proven thing here, which is a real reason to pick something above instead.
Private beta on iOS. We let people in a handful at a time.
No launch spam. One email when it is your turn.
Prices and features checked on 22 August 2026 against each maker's own site. They move. If you are reading this much later, check before you buy anything.