Inside Chunk: Why Its Creator Thinks in Time, Not To-Do Lists

At a time when many productivity tools are becoming increasingly complex — adding collaboration layers, AI features, dashboards, subscriptions, and entire ecosystems — Chunk feels intentionally different. It’s a lightweight, local-first Mac utility built around a simple idea: a day isn’t a list of tasks—it’s a finite amount of time.

After spending a week testing Chunk, we reached out to Chunk creator Dudley Spence to talk about time blocking, local-first software, AI assistants, and why focused tools often outperform bigger platforms.

Here’s our full conversation.

TheSweetBits: What does the name “Chunk” represent to you personally? If you met someone who had never heard of the app, how would you describe it in a single sentence?

Dudley Spence: “A day isn’t a to-do list, it’s a finite set of chunks of time, and you get far more out of it when you decide what goes in each one instead of reacting to whatever’s loudest. The name is a reminder to plan in blocks, not bullet points.

And, one sentence: Chunk turns your to-do list into an actual plan for your day by giving every task a place on your timeline.”

Chunk feels different from most productivity apps. Why did you make time blocking the core workflow instead of building a full calendar replacement or all-in-one task manager?

“Because the problem worth solving sits in the gap between those two things. People already have a calendar for their meetings and a list for their tasks. What they don’t have is the deciding bit: when am I actually going to do this work.

A calendar replacement asks people to abandon Google Calendar or Outlook, which nobody wants to do. An all-in-one task manager tries to be your entire second brain and slowly becomes another system to maintain.

Chunk stays deliberately narrow. It does the one thing those tools don’t, which is help you commit your tasks to time without context switching across apps or windows. Keeping that scope tight is a feature, not a limitation.

And lastly, because it works. Every day we get emails from people who’d cycled through a string of apps and methods that either lacked what they needed or were too bloated, and finally found a workflow that stuck with Chunk.”

You mentioned loving the translucent overlay panel. What made you choose a slide-over UI that stays out of the way, rather than a traditional multi-pane window?

“We’ve all had the experience of adopting a new productivity app only to realize we spend more time managing it than it ever saves us. Planning your day is something you do around your real work, not instead of it.

A full multi-pane window demands a context switch: stop what you’re doing, open the productivity app, manage it, close it. The slide-over inverts that. It appears, you drop a task onto the timeline, it’s gone again. The translucency is part of the same idea, staying visually anchored to whatever you were already looking at instead of replacing it.

We have a large base in the ADHD community, and that’s taught us context switching is the real killer of focus. There’s no point making a plan if the act of checking it keeps pulling you away from doing it.”

Chunk is local-first and privacy-focused, but it still syncs two-way with Google Calendar and Outlook. How do you explain that balance to users?

“The way we frame it: your data lives on your machine, and the sync is a convenience layer on top, not the foundation. Chunk works fully offline, and your timeline isn’t sitting in a database somewhere waiting to be analyzed.

But your meetings are real constraints on your day, and a planner that ignored them would be useless. So the calendar sync is a two-way bridge to calendars you already own and control, not us becoming the new home for your data.

The test we hold it to: if our servers vanished tomorrow, your Chunk should still work. Local-first is the architecture; sync is just there to be helpful.”

What made you decide to explore MCP integrations? For someone using Claude Desktop today, what can they actually do with their Chunk timeline and tasks?

“The most tedious part of time blocking has always been the data entry, and that’s exactly what an assistant is good at. Rather than bolt a chat box onto the app, MCP lets people use the assistant they already have, operating directly on their real Chunk data.

In practice that means you can ask Claude things like “what’s on my schedule today,” “block two hours tomorrow morning for the quarterly report,” “add these five tasks to my backlog,” or “push my afternoon blocks back an hour,” and it actually moves things on your timeline and task lists. It turns planning from a drag-and-drop chore into something you can do in plain language.

For a lot of people, step one of any project is now to talk it through with an AI to flesh it out and structure it, which is great, but who wants to then copy all of that into a productivity app by hand?

The idea with Chunk is that you can start a fresh project, plan it end to end with Claude, and then just watch as it turns that plan into real time blocks and tasks on your timeline.”

Why did you choose a lifetime license instead of a subscription?

“Partly principle, partly the shape of the app. A tool you open every single day shouldn’t come with a meter running in the background. That quiet monthly “am I getting my money’s worth” is the exact opposite of what planning your day should feel like.

And because Chunk is local-first, we’re not carrying the heavy per-user server costs that a subscription usually has to cover, so we don’t need to manufacture a recurring charge to justify one.

A one-time price is simply more honest for this kind of software: you buy it, it’s yours. (We’re also looking at Setapp for people who’d rather rent than own, but the direct purchase will stay a lifetime license.)

The same thinking applies to the trial. There’s nothing worse than wanting to try before you buy and being forced to hand over card details first, so we skipped that entirely. No card required.”

Looking at the roadmap, what upcoming features are you personally most excited about?

“The honest answer is the one our users have made for us: a companion mobile app. It’s been the number one request since day one and almost certainly will stay there until it ships, so that’s the big one, and yes, we’re working on it.

Beyond that, the feature we’d personally love to build is in-app natural language planning: one shortcut, and you can plan your whole day out loud from inside Chunk itself, no typing, no dragging. That one’s further out, but it’s the direction we find most exciting. Planning your day should be as quick as saying it.”

Final Thoughts

What we found most interesting wasn’t any single feature. It was the consistency of the philosophy behind them.

The slide-over interface, local-first architecture, lifetime license, and even the Claude integration all stem from the same idea: productivity tools should reduce friction, not create more of it.

In a category increasingly filled with all-in-one platforms and recurring subscriptions, Chunk feels almost old-fashioned in the best possible way. It focuses on a specific problem, stays out of the way, and trusts users to build their own workflow around it.

Whether that approach resonates will depend on how you plan your day. But after speaking with Dudley, it’s clear that Chunk‘s strongest feature may not be its calendar sync, templates, or AI integrations. It may simply be knowing exactly what it wants to be.

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