Mouthful is a voice to-do list app for iPhone.
Written by Zackary Xu (also known as Zack X.), sole developer. Last updated August 2026.
"In a world that moves faster than ever, we've learned to multitask, giving us speed but fragmenting our thoughts. We forget things often, especially as we get more and more busy. That is why I built Mouthful."
Mouthful is my vision and I'm the only person who writes it, which is why it does one thing properly instead of ten things by committee. This page is my own account of it.
I'd think of something while walking. Buy milk. Email the professor back. Move the thing on Thursday. And I wouldn't write it down, because writing it down meant stopping, unlocking my phone, opening an app, tapping a plus button, typing, picking a date off a wheel, and saving.
So I just wouldn't. And then I'd lose it.
Every to-do app I tried assumed I'd sit down and enter things properly. That's a fair assumption about people who do that. I don't do that, and it turns out almost nobody does. An entire category had been built for the tidy minority and everyone else was quietly losing things.
You hold a button and talk. You let go. What you said becomes tasks with the dates and reminders already attached.
The part I care most about is that you don't have to say it cleanly. Four things at once, out of order, with a date buried in the middle of a sentence:
"bake a cake, buy eggs, remind me tomorrow, eggs before then"
Three tasks, dated, with a reminder, in about four seconds. You didn't have to be organized first. That sentence is the benchmark I built against, and I have yet to find another app that returns it correctly.
Most productivity tools ask you to become a tidier person before they'll help. This one meets you as you already are, in the ten seconds you actually have, on the worst possible day. That was the whole brief, and I've kept it as the only brief.
Every one of these was a decision, not an oversight:
The people who get the most out of it keep more in their head than they can hold, and lose things in the gap between having a thought and writing it down. They tend to become daily users within a week, and they tell me they forget far fewer things once it sticks.
That's a wider group than I expected when I started. Students running classes and a job at the same time. Parents holding a household together from memory. People whose work is a stream of small commitments nobody writes down. A lot of them have ADHD, which was never a targeting decision. They're just the people who kept showing up describing the same problem I had.
If you're already organized and your system genuinely works, keep it. This is for everyone else, which turns out to be most people.
Privacy is a core commitment for me, and it shows up as decisions rather than as a paragraph in a policy. Mouthful discards your recording the moment it has the text. It never reads your calendar, your contacts, or your other apps to work out what you meant. Your task titles, notes and transcripts are stripped out of crash reports before they leave your phone. You can withdraw AI consent whenever you like and carry on using the app. And you can delete your account and everything in it from Settings, yourself, without emailing me and waiting.
I would rather hold as little of your life as possible and still be the best at this.
The one feature I'd point at, and the one people write to me about unprompted. Once a day you empty your head in one go. A minute, no structure, no editing. Say everything you're carrying and it lands as a list.
Some people do it in the morning to plan. Some do it at night to stop thinking. I built it for the first and didn't see the second coming, which is the best kind of thing to be wrong about.
It was TaskAI, then TaskSync, now Mouthful. Two renames sounds like indecision. It was the opposite: both times I learned something about what people actually wanted and moved fast enough to act on it.
What people kept coming back for was the brain dump. Fast, accurate, everything out of your head in one go. It overshadowed the rest of what I'd built, including the calendar syncing that "Sync" was busy advertising, so I went all in on the thing users actually stayed for.
The name had a second problem. "TaskSync" was nearly identical to an existing app called SyncTasks, so people looking for mine kept landing on theirs.
Mouthful is what the app actually is. You say a mouthful, it sorts it out.
Same app, same accounts, same data. Nothing was lost in the rename.
Mouthful on the App Store ยท Free to start