App Comparison
Todoist helps millions organize their lives with projects, labels, and filters. OneTask ignores all of that and gives you one task and a timer. Here is why both approaches have merit.
| Feature | OneTask | Todoist |
|---|---|---|
| Core Approach | Single-task execution timer | Full-featured task management platform |
| Task Lists | No lists — one task at a time | Projects, sections, labels, and filters |
| Timer | Built-in focus timer with Live Activity | No built-in timer |
| Collaboration | No collaboration — personal focus only | Shared projects, comments, task delegation |
| Integrations | Apple ecosystem (Live Activity, widgets) | 100+ integrations (Slack, Gmail, Zapier, etc.) |
| Widgets | Home screen and Lock screen widgets | Home screen widgets |
| Apple Watch | Full Apple Watch support | Apple Watch app available |
| Platform | iPhone, iPad, Apple Watch | iOS, Android, Mac, Windows, Linux, Web |
Todoist is best for
Todoist is ideal for anyone who needs a reliable, cross-platform task manager that scales from personal use to team collaboration. It excels at capturing tasks quickly with natural language, managing multiple projects, and keeping everything synced across all your devices.
Todoist is the world's most popular task management application with over 42 million users. It offers a clean, intuitive interface for creating and organizing tasks using projects, sections, labels, filters, and priority levels. Todoist supports natural language input, recurring due dates, task comments, file attachments, and powerful collaboration features including shared projects and task delegation. The app works across every platform imaginable: iOS, Android, Mac, Windows, Linux, and web. It integrates with hundreds of other tools through its API and native integrations. Todoist also includes productivity tracking with karma points and completion trends.
Pricing: Free plan with up to 5 projects. Pro at $4/month. Business at $6/user/month.
OneTask is best for
OneTask is built for people who do not need another way to capture and organize tasks — they need a way to actually start doing them. It shows one task at a time with a timer, Live Activity on the Lock Screen, widgets, and Apple Watch support to maintain single-task commitment.
An execution constraint for iPhone. One task at a time, always visible.
Pricing: $3.99/month or $29.99/year
Todoist is exceptional at capturing tasks. Its natural language input lets you type something like "Call dentist tomorrow at 2pm #health" and it creates a perfectly organized task instantly. It is designed to be your external brain for everything you need to do. OneTask does not care about capturing. It cares about doing. You type one task, set a timer, and start. There is no inbox, no quick capture widget, no email forwarding. This makes OneTask useless for task management and excellent for task execution. The question is which problem is bigger in your life.
Todoist scales from a simple grocery list to a complex team workflow with hundreds of projects. This flexibility is its greatest strength and, for some users, its greatest challenge. The more tasks you add, the more you need to organize, review, and prioritize. OneTask cannot scale at all — by design. It holds one task. This constraint is the entire point. For people with ADHD who find that large task lists create anxiety and avoidance, the inability to see everything at once can paradoxically increase productivity.
Todoist works everywhere. iOS, Android, Mac, Windows, Linux, web browsers, email plugins, browser extensions — if a platform exists, Todoist probably runs on it. This is essential for many people's workflows. OneTask is iPhone, iPad, and Apple Watch only. It trades universal access for deep Apple integration: Live Activity on the Lock Screen, Dynamic Island presence, Lock Screen widgets, and native Apple Watch complications. If you switch between Apple and non-Apple devices, Todoist is the only viable option. If you are fully in the Apple ecosystem, OneTask uses that ecosystem more deeply.
Todoist includes karma points, streaks, and productivity visualizations that reward consistent task completion over time. This gamification motivates many users and provides useful data about their habits. OneTask has no gamification, no streaks, and no productivity analytics. It does not reward you for completing tasks or track your patterns. It simply shows you one task and a timer. For people who are motivated by tracking and stats, Todoist provides that dopamine. For people who find that tracking becomes another source of procrastination or guilt, OneTask avoids it entirely.
Todoist is the most popular task manager in the world for a reason. It combines ease of use with genuine power, works everywhere, and has a generous free tier. For most people, Todoist is an excellent choice and may be the only productivity app they ever need. OneTask is not for most people. It is for the specific person who has tried Todoist — maybe even used it successfully for a while — but finds that the list of tasks becomes a source of anxiety rather than clarity. It is for the person who adds tasks to Todoist reliably but cannot make themselves start working on any of them. OneTask strips away everything Todoist offers and replaces it with a single commitment: one task, one timer, right now. If Todoist helps you stay organized and productive, stay with Todoist. If you are organized in Todoist but still not getting things done, OneTask offers a fundamentally different approach worth trying.