David Allen was right. The tools are wrong.
GTD's core insight is deceptively simple: your brain is for having ideas, not holding them. Every open loop — every task, commitment, or "I should probably" floating in your head — costs cognitive overhead. The solution is a trusted external system that captures everything, processes it reliably, and surfaces what you need to work on when you need to work on it.
That insight is as true today as it was when Allen published the book in 2001. The anxiety of an overloaded mental inbox hasn't changed. What's changed is the number of tools claiming to solve it — and the gap between what they advertise and what they actually deliver.
A real GTD app doesn't just give you a place to write things down. It has to support all five steps of the GTD workflow, because the steps are a system — not a suggestion. Skip one and the whole thing degrades. Most apps skip at least two.
The five steps that every GTD app ignores
GTD is a five-step process. Each step has a specific function. Together they form a closed loop — input goes in, gets processed, gets organized, gets reviewed, and then gets acted on. Break the loop anywhere and you're back to managing anxiety instead of eliminating it.
Get everything out of your head into a single trusted inbox. Every idea, task, commitment, and "I should" goes here — immediately, without judgment.
Process each inbox item: Is it actionable? If yes, what's the very next physical action? If not, does it go in reference, someday/maybe, or the trash?
Put everything in the right place: next actions, projects, waiting-for, someday/maybe, reference material. The right bucket for the right item.
The weekly review. Go through every list, every project, every open loop. Update, complete, prune. This is what keeps the system trustworthy.
Choose what to work on based on context, energy, time available, and priority. The system tells you what's possible — you decide what's next.
Notice the symmetry. Steps 1–3 are about loading the system. Step 4 is about maintaining it. Step 5 is the payoff — you actually do work from a position of clarity. The weekly review is the hinge. Without it, captured items pile up, lists go stale, and trust in the system evaporates. Within a few weeks, you're back to managing your tasks in your head because the "system" can't be relied on.
The weekly review isn't optional. It's the maintenance schedule that keeps the engine running. A GTD app without a built-in review workflow isn't a GTD app — it's a fancy to-do list.
Why Todoist, Things, and OmniFocus each miss the point
The best-known GTD apps each nail parts of the workflow. None of them closes the loop.
| GTD Step | Todoist / Things | OmniFocus |
|---|---|---|
| Capture | Quick add, natural language ✓ | Universal inbox ✓ |
| Clarify | No processing workflow — tasks sit in inbox unreviewed | Inbox processing built in ✓ |
| Organize | Projects exist but no "areas of focus" distinction; someday/maybe is bolted on | Projects + areas of focus ✓ |
| Reflect (Weekly Review) | Not built in. You're on your own. | Review mode exists but no guided workflow — just a list flag |
| Engage | Today view, filters ✓ | Forecast, context tags ✓ |
Todoist and Things are fast and clean. They're excellent at steps 1 and 5: capturing quickly and surfacing tasks when you need them. But they have no concept of a processing workflow. When you add something to your Todoist inbox, it stays there until you manually move it. There's no clarify step — no prompt to ask "what's the next action?" There's no built-in weekly review. The system has no maintenance cycle, which means it gradually becomes untrustworthy.
OmniFocus is the most GTD-complete tool in the mainstream market. It has an inbox, projects, areas of responsibility, a review mode, and context tagging. But it's also notoriously complex — the learning curve is steep enough that "OmniFocus setup" is its own cottage industry of YouTube tutorials and courses. You can spend more time configuring OmniFocus than using it. A system that requires a $50 course to set up correctly isn't a system that most people will actually maintain.
And none of these apps connects your task system to your broader life structure. A task in Todoist is a task. It has no idea which area of your life it belongs to, whether it's connected to an active goal, or how much time you've spent on work versus health versus relationships this week. That's the deeper failure of most productivity tools — they manage individual tasks without ever helping you manage your life.
How broken is your current system? Find out in 2 minutes.
Score My System →What a purpose-built GTD system actually looks like
A purpose-built GTD system isn't a to-do app with a GTD label — it's software designed from the ground up around the five-step workflow. The difference is architectural.
In PillarOS, the five steps aren't a checklist you follow manually. They're built into the flow of the app. The universal inbox is always one keystroke away (press / from anywhere in the app). Everything you capture lands in a single queue — no decisions required at capture time. Just get it out of your head.
The processing workflow is built into the inbox view. When you work through your inbox, PillarOS surfaces one item at a time and asks the GTD clarifying questions: Is this actionable? If yes, which pillar does it belong to? What's the next physical action? Is this a project (more than one step) or a single task? Items that aren't actionable get moved to reference or deleted. No item stays in the inbox by default — they move forward.
Organization is automatic, not manual. When you assign a task to a pillar — Health, Career, Relationships, Finance, Personal Growth — the structural relationship is built into the system. You don't maintain a "Health" project database and a separate "tasks" database linked by a relation field. Every task inherently belongs to an area of your life. This is the same architectural approach that makes a purpose-built PARA method app work better than a Notion template — the structure is baked in, not bolted on.
The weekly review is a guided four-step wizard. It auto-calculates your week's output: how many tasks completed per pillar, how many hours of deep work logged, which areas got attention and which were neglected. The review isn't a list you look at — it's a process that moves you through your open loops, your projects, and your commitments, and tells you what needs attention before the next week starts.
GTD's promise is that your system handles the cognitive overhead — so you can focus on doing the work, not managing the backlog. That only works if the system actually runs itself. A system you have to manually maintain is just more overhead with extra steps.
The engage step — choosing what to work on — is supported by the time-blocking layer. Once you've processed your inbox and your weekly review is clean, PillarOS shows you a day timeline where you can schedule focus sessions tied directly to your pillars. The built-in Pomodoro timer logs deep work automatically, so your weekly review has real data: not just what you planned to do, but what you actually spent time on.
This closes the loop that every other GTD app leaves open: the connection between the task system (what you committed to doing) and the time system (when you're actually going to do it). GTD without time-blocking is a backlog. GTD with time-blocking is a life operating system.
Score your current system before you switch
If you've been using a GTD app for more than a few months, the honest question isn't whether it's working perfectly — it's where the cracks are. Most people using Todoist or Things have an inbox that hasn't been properly processed in weeks. Most people using OmniFocus haven't done a weekly review in months. The system is technically "set up" but the maintenance cycle has quietly stopped.
Before switching to anything new, it's worth getting an honest read on what's actually broken. The PillarOS readiness quiz takes two minutes and gives you a score: is your system solid, showing cracks, or in purgatory? The results tell you specifically which steps of the GTD workflow are failing — not just a vague sense that something isn't working.
If you already know what's broken and you're ready for a system where the five steps are built into the software — the waitlist is below. PillarOS is in beta, free during early access.