GTD on iPhone: Using Nemos as Your Ubiquitous Capture Inbox

David Allen's Getting Things Done methodology begins with a single requirement: a ubiquitous capture system. Everything that has your attention must go somewhere external and trusted. If it stays in your head, it costs mental energy maintaining itself in working memory.

The classic GTD capture tool is an in-tray—physical or digital. On iPhone, Nemos works as a high-performance mobile capture layer that feeds your GTD system without competing with it.

Where GTD and iPhone Note-Taking Intersect

GTD practitioners often struggle with mobile capture because most GTD-compatible apps are process-heavy—they want you to categorize, assign context, and project at capture time. Allen's methodology doesn't require this; he's explicit that capture and processing are separate phases.

Nemos fits GTD's capture philosophy precisely: put everything in, process later. No categorization at capture time. No context tags required to create a note. The note goes in; you process it when you're at your desk.

The Nemos-as-GTD-Inbox Pattern

In GTD terms, Nemos functions as your mobile inbox—the collection point for everything that has your attention when you're away from your primary system.

What to capture in Nemos (GTD capture): - Open loops: anything you've agreed to do, might do, or have to decide about - Project-related thoughts: anything relevant to an ongoing project that isn't yet in your project support materials - Someday/maybe items: ideas you want to revisit but not act on now - Reference information: anything you might need to retrieve later - Triggers: anything that reminds you of something else that might need capture

The ubiquitous capture rule means you don't filter at capture. If it has your attention, it goes in.

Processing Nemos into Your GTD System

GTD processing happens at regular intervals—daily or during weekly review. The question for each Nemos note: "What is this, and what do I want to do with it?"

Processing paths: - Actionable: if the next action takes less than 2 minutes → do it now. Otherwise: identify the next action and add to your Next Actions list in your GTD system - Project: if it requires more than one action → add to projects list, identify next action - Someday/Maybe: not actionable now but worth keeping → add to Someday/Maybe list - Reference: no action required, might need later → file in reference system - Trash: no value → delete from Nemos

After processing, the Nemos note is archived (or deleted if it's been moved to the GTD system). Nemos stays clean as the inbox; your GTD system holds the processed material.

Tools That Pair Well With Nemos for GTD

Nemos is the capture layer. The GTD system needs additional tools:

Task management: OmniFocus (the most fully GTD-native app), Things 3, Todoist, or a simple list app. Actions go here after processing.

Calendar: Apple Calendar, Fantastical, or similar for time-specific and day-specific items.

Reference system: Notion, DEVONthink, Obsidian, or Apple Notes for searchable reference files.

Tickler file: A calendar-based or reminder-based system for time-triggered reference. Nemos can feed this via reminders set during processing.

Nemos → process → task manager (actions), calendar (time-specific), reference system (information). The processing converts Nemos captures into properly placed GTD material.

GTD and the Trusted System Problem

GTD works only if you trust your system. Trust means you believe that everything important is captured and will be processed. If you occasionally doubt whether something got into the system, the system fails—your mind re-takes responsibility for the open loop.

Nemos builds trust via speed: you can capture anything in under 5 seconds, from any context. When you're in a meeting and a next action comes up, it goes in Nemos before the meeting continues. When a commitment appears in a text message, you open Nemos and capture it. Nothing waits for later capture.

The psychological benefit: your mind knows that the system catches everything, so it releases the task of holding things in working memory. This is what Allen means by "mind like water."

Weekly Review: Processing the Nemos Archive

GTD's weekly review is where Nemos gets processed. During the review:

1. Open Nemos
2. Work through recent captures (oldest to newest)
3. Process each note according to the GTD processing rules above
4. Clear all processed notes (delete, or archive if you want a record)
5. At end of review: Nemos inbox is empty

Empty Nemos at end of weekly review is the GTD equivalent of an empty email inbox: a closed loop, a mental reset.

Context Tags: GTD's Way vs. Nemos's Way

GTD uses context tags (@phone, @computer, @errands) to batch similar next actions. Nemos doesn't support tags, but you can use a simple prefix convention:

• `@errand: pick up prescription`
• `@call: follow up with Marcus re: proposal`
• `@computer: research competing bids for Q3`

These prefix notes are captured in Nemos and search-retrievable later. When processing, they translate directly to context-tagged next actions in your task manager.

GTD Someday/Maybe in Nemos

Some GTD practitioners use Nemos as their someday/maybe list—not just a capture inbox, but a permanent collection of ideas and projects they might pursue. This works if:

• The someday/maybe list is reviewed periodically (GTD says at least monthly)
• Items are clearly distinguished from active projects (e.g., "SM: learn Arabic" prefix)
• The list doesn't grow so large it becomes aversive to open

For practitioners with large someday/maybe lists, a dedicated list in OmniFocus or Notion may be more manageable than an unstructured Nemos archive.

Daily Review with Nemos

Some GTD practitioners do a lighter daily review in addition to the weekly: a quick Nemos scan, action on anything time-sensitive, and preparation for the next day. This takes 5-10 minutes and prevents the weekly review from becoming overwhelming.

Daily review sequence: 1. Scan Nemos notes from last 24 hours 2. Process anything time-sensitive (due today, promised for today) 3. Add top 3 priorities to today's calendar or notes 4. Close Nemos

The Capture-First Mindset

GTD's biggest behavioral shift is learning to capture reflexively—before you decide what to do with something. Nemos on iPhone trains this reflex: open, type, close. No decision required.

The habit builds over weeks. Eventually, capturing feels like the natural response to any open loop—not a discipline you have to maintain, but a reflex you rely on.

FAQ

Is Nemos a GTD-complete app? No. Nemos is a capture tool. GTD requires additional tools for processing, next actions, projects, waiting-for lists, and calendar. Nemos handles the collection phase; your full system handles the rest.

Should I process notes in Nemos or move to another app? Process by reading in Nemos and creating the processed item in your task manager or reference system. Delete or archive in Nemos after processing. Don't try to use Nemos as the processing location.

What if I miss my weekly review and Nemos accumulates? Process what you can, prioritize time-sensitive items, and don't let a backlog prevent you from continuing to capture. A backlogged inbox is better than no inbox.

How does GTD handle voice notes? Voice notes (Nemos voice-to-text) are valid GTD captures. Transcribe them via iOS voice-to-text at capture time so they're searchable during processing.

Can I use GTD on iPhone without Nemos? Yes. OmniFocus and Things 3 both have quick capture features. Nemos offers lower friction for pure text capture without entering the task management UI. Choose based on what removes more friction for you.

What about Nemos for waiting-for lists? You can use Nemos for waiting-for capture during the day, then process into your formal waiting-for list during review. Some practitioners prefer keeping waiting-for in their task manager directly; others use Nemos as the capture point. Either works.

Related Reading

• How to Build a Note-Taking Habit on iPhone
• Best Quick Note App for iPhone in 2026
• How to Never Forget an Idea on iPhone
• iPhone Shortcuts for Note-Taking: Automations That Save Time

Sources

• David Allen, *Getting Things Done* (2001, revised 2015)
• App Store: Nemos — Note-Taking App
• App Store: OmniFocus, Things 3, Todoist (task management context)