Compare one sec and To-do List: Which Extension is the Best?

One Sec is a browser extension designed to help you manage your time online by introducing a brief pause before accessing distracting websites.
To-do List is lightweight, fast, and focused on the basics like quick add, due dates, and reminders. Great for simple workflows, but power users may miss some features.
Key Features
  • Pause Before Access: Introduces a short delay before opening distracting sites.
  • Customizable Settings: Adjust the delay time and select which sites to monitor.
  • Analytics Dashboard: Provides insights into your browsing habits.
  • Cross-Browser Support: Available on multiple browsers for seamless integration.
  • Quick Add: Add tasks from the toolbar popup or context menu.
  • Due Dates & Reminders: Set deadlines and get simple browser notifications.
  • Lists or Tags: Keep tasks organized with a basic structure.
  • Keyboard Shortcuts: Add and complete tasks faster.
  • Minimal UI: Clean, focused layout.
  • Offline Support: Works offline and syncs later.
  • Task Notes: Add small clarifying details.
Our Rating
8.9
8.7
Total users
35,637
20,000
Total ratings
1,125
124
Average rating
4.9 ⭐
4.8 ⭐
Entry Level PriceFreeFree
Chrome
Chrome Web Store logo
4.9
4.92
948 ratings
30.0K+Users
Chrome Web Store logo
4.8
4.76
124 ratings
20.0K+Users
Edge
Microsoft Edge Store logo
4.9
4.85
51 ratings
3.7K+Users
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Firefox
Mozilla Firefox Add-ons Store logo
4.8
4.76
126 ratings
1.9K+Users
-
Safari
-
-
Features
7.5

The core function that One Sec uses to make users more productive is a pause before opening the website. When I open websites I have defined, such as Twitter, a gray page with a countdown appears. During this period, I was reminded that I didn't want to spend so much time on Twitter and asked myself whether this was intentional or just a reflex out of boredom.
This worked very well for us in the test and there were no problems.


It is also possible to adjust the delay individually. If you only need the reminder but don't want to be disturbed too much, you can set the timer to just one second, or several seconds if you prefer.


Finally, a useful function is the analysis dashboard. This provides analyses of your surfing behavior, showing you at a glance how often you try to open these websites during the day. However, we would like to see more analysis options here.


All in all, the functions are kept very simple; further options for time tracking would be an advantage here so that you don't need additional extensions. These functions are already available in the mobile app. One Sec is a good addition to existing time management extensions.

8.0

We like that it nails the essentials without pretending to do everything. You can capture tasks quickly, organize with simple lists or tags, add due dates and reminders, and attach short notes to keep context. It also syncs and works offline when needed. The flipside is clear: there are no advanced filters, templates, or automations, and integrations are minimal. If “fast basics” is your goal, it succeeds.

Performance
9.5

In our test, we did not notice any delays or slowdowns due to the extension.
Regular updates are also released to improve performance and fix bugs.

8.8

It feels instant, which matters more than people admit. The pop-up opens quickly, typing and checking off tasks are immediate, and sync behaves reliably across sessions without hogging memory or slowing other tabs. Staying fast keeps you in flow—and that’s the real performance test for a to‑do tool. We never felt it getting in our way.

Design
8.0

The user interface is clean and minimalist, and this also applies to the setup and settings. The extension offers an effective use of visual elements for taking a break by displaying a preset screen with a countdown. There would be potential for improvement here if the screen could be customized.

8.2

The interface is clean, calm, and focused on the list. We noticed readable typography, sensible spacing, and a clear hierarchy that keeps controls out of the way. Keyboard navigation works well, and the UI feels snappy in both pop-up and full view. The minimalist approach avoids visual clutter without feeling bare. It looks and feels like a tool designed for momentum.

Value for Money
9.2

The browser extension is completely free of charge. However, you only get a small number of functions. For anyone who only needs the basic function, this is unbeatable value for money.

OneSec also offers an app with additional functions. At $4.99/month or $49.99/year, it also has a good price-performance ratio.

9.0

As a free, lightweight checklist, it delivers real everyday value. There is a ceiling for power users, who may still want a pro task manager as needs grow. But as a companion list that stays out of your way, it punches above its (free) weight

Ease of Use
9.5

The installation process was quick and straightforward. This also includes the setup, which is very intuitive with clear step-by-step instructions. Everything is also well explained in the settings menu afterward, so everyone should be able to find their way around.

set up
9.2

This is a tool you understand in a minute. We didn’t need a tour—adding, editing, reordering, and completing tasks are all immediately discoverable, and the few shortcuts are easy to remember. The daily flow of capture → prioritize → complete is frictionless, and it’s forgiving when you make quick edits or misclicks. If you value speed over setup, it shines.

Security & Privacy
9.5

Data usage is described transparently in the privacy policy, which places great value on user privacy.
This is also reflected in the fact that the features already work with minimal authorizations so that not much private data needs to be tracked.

9.0

It keeps things modest, which often helps privacy by default. From our use, it appears to rely on browser sync with local storage offline and keeps permissions lean, avoiding unnecessary prompts. We’d still like clearer public documentation about data handling and retention. In practice, it benefits from the security of the browser’s sync, but more transparency would inspire extra confidence.

Conclusion

One Sec is a tool that encourages mindful browsing by introducing a pause every time you want to access a distracting website.
Although it stands out for its simplicity and effectiveness, its limited functionality means that it should only be seen as a supplement in the area of time management. Overall, however, it is a valuable tool for anyone looking to improve their online productivity.

If you want a simple, reliable checklist in your browser, To‑do List nails the basics. It’s fast, easy, and stays focused.

The trade‑off is fewer power features. If you need advanced filters, templates, automation, or deep integrations, you may outgrow it.

We’ll keep it for small personal lists and quick captures. For complex projects, we’d still choose a fuller task manager. As a focused browser to‑do, it’s a solid pick.

Our Recommendation

In our comparison between one sec and To-do List, one sec came out on top, scoring 8.9.

one sec is the most widely used, with over 36k users and 1k+ reviews—and it also delivered the strongest performance in our tests. User reviews reflect our findings.

Notably, one sec has the highest user rating in the Chrome Web Store at 4.86, which supports its strong performance in our review.

In the end, the differences between these extensions are minimal, so your choice may come down to personal preference or specific features.


  • Looking for the richest feature set? To-do List stands out with a rating of 8. On the other hand, one sec lags behind in this area with a rating of 7.5.
  • Need top performance? one sec stands out with a rating of 9.5. On the other hand, To-do List lags behind in this area with a rating of 8.8.
  • Design lovers, take note: To-do List stands out with a rating of 8.2. On the other hand, one sec lags behind in this area with a rating of 8.
  • Want to get the most for your money? one sec stands out with a rating of 9.2. On the other hand, To-do List lags behind in this area with a rating of 9.
  • If you hate complicated tools, one sec stands out with a rating of 9.5. On the other hand, To-do List lags behind in this area with a rating of 9.2.
  • With privacy and security becoming ever more important, one sec stands out with a rating of 9.5. On the other hand, To-do List lags behind in this area with a rating of 9.

If you want a quick recommendation, one sec is our top pick. But as always, the best choice depends on what matters most to you.