
D3.js
Vizzu
Jupyter
Vega-Lite
nivo
Looker
Microsoft Power BI
Interactive code examples/posts

E.ggtimer.com
UbiTimer is a PowerPoint timer add-in that helps presenters stay on track with a clear countdown across slides. Simple and effective.

Which is more popular?
Based on our record, Observable seems to be more popular. It has been mentioned 347 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | observablehq.com | ubitimer.com |
| Pricing | ||
| Company | — | Startup from the United Kingdom · 1 - 9 employees · 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Observable yet.
UbiTimer is a lightweight PowerPoint add-in that adds countdown, count-up, and radial timers directly to your slides. Perfect for teachers, presenters, and trainers, it helps keep lessons and meetings on schedule. Works on Windows and Mac, supports slideshow mode, and offers a free EDU version...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Observable Overview
More videos
UbiTimer Global Timer Across Slides in PowerPoint
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Observable and Ubi Timer.
Ubi Timer's answer:
Ubi Timer brings timing directly into PowerPoint, so presenters do not need to switch to a browser, phone, or separate desktop timer. It supports countdown and stopwatch modes, works during Slide Show, and can be used per slide or across sections of a presentation, which makes it especially useful for lessons, workshops, rehearsals, and live talks.
Ubi Timer's answer:
Choose Ubi Timer if you want a timer that feels native to PowerPoint instead of bolted on. It is designed to be quick to set up, easy to style to match your slides, usable on Windows, Mac, and PowerPoint for the web, and reliable in live presentation settings without needing to leave your deck. It also offers a free version and a free EDU option for verified schools.
Ubi Timer's answer:
Ubi Timer is built for teachers, trainers, presenters, and speakers who use PowerPoint and need better control over timing. It is especially well suited for classrooms, workshops, meetings, practice sessions, and any presentation where staying on schedule matters.
Ubi Timer's answer:
Ubi Timer was created out of frustration with standalone timers and makeshift PowerPoint timer setups built from animated slides. The goal was to create a cleaner, easier, and more reliable way to manage time inside PowerPoint without disrupting the presentation experience.
Ubi Timer's answer:
Ubi Timer is built as a Microsoft PowerPoint add-in for Microsoft 365 and Office, designed to work directly inside PowerPoint across supported Windows, Mac, and web environments. I could not find a trustworthy public source naming the full internal stack, so this answer is safest for a public listing.
Ubi Timer's answer:
Teachers and schools Corporate trainers Workshop facilitators Public speakers and presenters Teams using PowerPoint for meetings and rehearsals
Share your experience with using Observable and Ubi Timer. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Observable is a Grafana alternative that enables users to visualize data via charts and dashboards using code.
A few options were disregarded from the start due to a hefty price tag, these were Looker, Tableau, Power BI, GoodData. A few options like Trevor.io, Preset, Observable were disregarded as they did not seem to fit our...
We have no reviews of Ubi Timer yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Holy hell, this is great. I once made a little tool for getting more intuitive spatial scales for things in the universe at https://observablehq.com/@ikesau/scale-to-the-universe I feel like you could do something similar for these sorts... - Source: Hacker News / about 1 month ago
Folks may find https://observablehq.com/@fil/poisson-distribution-generators useful. - Source: Hacker News / about 2 months ago
That's because Gaussian splats are ellipses without any texture of their own (more or less), missing any texture that an actual brush stroke would have. Because the ellipses are so elongated in the finer details it feels like layered... - Source: Hacker News / 3 months ago
Tracking Ubi Timer since Oct 2025.
When comparing Observable and Ubi Timer, you can also consider the following products.

D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
Compare D3.js to Observable or Ubi Timer:

A simple countdown timer with an alarm for the browser.
Compare E.ggtimer.com to Observable or Ubi Timer:

Vizzu lets you use animated charts to share insights in complex data sets as self-explanatory stories.
Compare Vizzu to Observable or Ubi Timer:

Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.
Compare Jupyter to Observable or Ubi Timer:

