Around 250 BCE, Archimedes proved that pi is greater than 223/71, the first precise lower bound for a number that had long been loosely estimated.

This update also offers more precision. Play mode in Sandbox is now called Slideshow. When remaking padlets, "Copy people and privacy" is now "Copy collaborators and privacy settings." And, when you take a screenshot of your padlet, the share panel appears automatically.

Around 250 BCE, Archimedes proved that pi is greater than 223/71, the first precise lower bound for a number that had long been loosely estimated.

This update also offers more precision. Play mode in Sandbox is now called Slideshow. When remaking padlets, "Copy people and privacy" is now "Copy collaborators and privacy settings." And, when you take a screenshot of your padlet, the share panel appears automatically.

A Saros cycle spans 223 lunar months. 3 of them form an Exeligmos, the point at which a solar eclipse returns to nearly the same place on Earth after 54 years, completing the loop.

Videos in sandboxes now open in a native expanded view, so your content gets the full-screen moment it deserves. And you can hit undo when you delete a section, because sometimes what disappears should find its way back.

Even the Saros cycle isn't perfectly precise. After 223 lunar months, each repeated eclipse drifts slightly, about 120° west. Ancient astronomers kept refining their models, making small corrections to keep predictions sharp.

This update makes our own small corrections: bug fixes and under-the-hood improvements to keep things running smoothly. No new features, just a tidier orbit.

Ancient astronomers noticed eclipses repeat in cycles: 223 lunar months, or about 18 years. They called this rhythm a Saros, and used it to predict celestial events with uncanny accuracy.

This update provides some predictability: you can create unlimited sandboxes for free through June 30, 2026. We've also added new comment display options for a cleaner, more focused collaboration experience.

A lunar cycle lasts 29 Earth days, 12 hours, 44 minutes, and 2.9 seconds. Every 223 cycles, the Sun, Earth, and Moon realign in a period called a saros, used to predict eclipses. One eclipse is followed by a very similar one a saros later.

Our share extension has reached its own alignment. Select unlimited photos and files, edit each post before publishing, and apply color, section, or location to everything in one shot. Posts now publish in the order you selected them.

22230 is a Harshad number, which means it’s divisible by the sum of its digits. We double-checked the math. Shoutout to the user who caught us claiming 22220 was a Harshad number.

This release keeps things just as tidy: submission links now work for individual sections, so sharing is more precise. It also includes general bug fixes and performance improvements to keep things running smoothly.

22220 is a Harshad number, which means it is divisible by the sum of its digits.

This release is similarly clean: bug fixes and improvements that smooth out the rough edges.

Under U.S. federal regulation 49 CFR § 222.1, trains must sound their horns at crossings unless they’re in a designated quiet zone.

In 222.1, you get more control over the noise: support for GeoRSS, podcast, and RSS feeds; a markdown view for your content; and overall speed improvements.

222 is a decimal repdigit, a strobogrammatic number, and a noncototient.

If you don’t know what any of that means, you can ask Siri. And with our latest update, you can also ask Siri to add photos, videos, and other attachments to your padlet.

In Unicode, U+2211 represents ∑, the summation symbol used in mathematics.

In this release, everything is adding up: a redesigned share panel with more flexible permission options. The ability to translate boards into nearly 50 languages. And a photo album attachment so you can include multiple images in one post.

Sherlock Holmes lived at 221B Baker Street, solving mysteries through keen observation and patience.

Not all of us can be so keenly observant nor patient. We now auto-publish your post drafts while attachments are uploading so you don't have to stick around. Elementary.

Draw all the diagonals of a regular decagon and you'll create exactly 220 regions.

We've added undo and redo for deleted drafts and posts. Handy whether you misspelled "decagon" or just changed your mind. Emoji reactions let you respond instantly with
whatever fits. Plus the usual bug fixes and improvements.

Project 22010 is a series of Russian research vessels designed for deep-sea exploration, equipped with advanced sonar and diving capabilities to uncover what lies beneath the ocean's surface.

We've equipped this release with accessibility improvements that dive beneath the surface to make Padlet more navigable for everyone.

220 and 284 are amicable numbers, a rare mathematical pair where the factors of each number add up to the other number, like mathematical besties.

We're adding features we hope you'll find amicable: an improved upload experience for large attachments including notifications so you can track upload progress. Now you'll see exactly how file uploads are progressing, making large file sharing smooth and peaceful.

In the year 2192 CE, Earth will experience a rare celestial alignment where Venus transits the Sun twice in the same decade.

We've aligned our own improvements: our new location picker helps you find exactly where you want to be with enhanced precision, while our accessibility upgrades make sure every user can navigate Padlet with ease.

In Unicode, character U+2191 is the up arrow: ↑

In release 219.1.0, we’re following the arrow upward.
Custom fields are getting an upgrade—you can now assign posts to other collaborators, making teamwork easier and more organized.

219 is the area code for Gary, Indiana, the birthplace of the Jackson 5 and their legendary harmonies that launched a musical dynasty.

Like a perfectly tuned ensemble, these updates work seamlessly: by popular demand, the Timeline board format makes its triumphant return. Plus, we now support phone number formatting, and the activity panel shows all posts even when they contain only custom field content.

In 2182, asteroid Bennu has a 1-in-2,700 chance of hitting Earth—the space rock with the highest known probability of impacting our planet in the next 200 years.

Like NASA planning centuries ahead, we're organizing for the future: whiteboard theme settings now have their own dedicated section, accessibility improvements make billing and notifications easier to navigate, plus we've fixed various bugs to keep everything running smoothly.

Around 2181 BC, Egypt's central authority had crumbled, leaving local governors to figure things out on their own. Yet somehow, this period of creative chaos led to some of the most beautiful art and literature in Egyptian history.

Like those resourceful ancient leaders, we've strengthened our foundations with quiet bug fixes and improvements that keep your creative work flowing without interruption.

218 is the atomic mass of astatine's most stable isotope—one of Earth's rarest elements with less than an ounce in the planet's crust.

Like discovering rare elements, we've unearthed precious improvements to the timeline format: resize and sort posts, and group them by section. We also added Kazakh and Icelandic support, plus improved Contact Form accessibility.

In "The Shining" by Stephen King, Room 217 is the haunted hotel room where supernatural events unfolded and ordinary objects took on extraordinary capabilities.

With release 217.0.0, we're giving you extraordinary capabilities with "Add to Padlet board" menu, expanded Options Panel, and crystal-clear SVG emojis. Plus, bug fixes and accessibility improvements make everything work with spine-tingling precision.

Some ancient Greek philosophers considered 216 a mystical number (6³), believing it represented perfect cosmic harmony and the mathematical structure underlying reality.

We've orchestrated a harmony of improvements in this release: the Additional Options panel unifies important settings, and Attachment settings let you control allowed file types.

Ancient records state the 215 B.C. was the year that Emperor Qin ordered the construction of his mausoleum, which included the famous Terracotta Army.

We're introducing our brand-new Table layout, perfect for neatly ordering custom fields like our new phone number and email fields into rosters and directories. Additionally we've added video trimming, significant increases to upload speeds, and plenty of bug fixes.

In the Unicode Standard—which assigns a unique number to every character used in digital text—the code point U+2157 represents the fraction ⅗ (three-fifths).
- Enhanced our accessibility features to make Padlet easier to use for everyone.
- Set a default card background in Sandbox to maintain a consistent look for all your posts.
- Bug Fixes & General Improvements

To launch version 215.6, we drew inspiration from the number 2156, which is a Harshad number—divisible by the sum of its digits without any remainder. Just as 2156 divides perfectly, our new update allows you to seamlessly split video recordings into precise segments using pause and resume.

Capture, refine, and share your moments exactly the way you want!