Roost: The App That Slows Down Your Messages On Purpose

A social messaging app called Roost has grown to nearly 300,000 users as of July 8, 2026, just five weeks after going viral on Threads. The app does something unusual: it deliberately slows down your messages to match the real-world speed of different animals TechCrunch.

Roost was created by Logan Mendelsohn, a product manager at Ticketmaster who initially built it as a side project for his friend group. His friends liked it so much they convinced him to release it on the App Store. You can find it at roostsocial.app.

How it works

The concept is simple. When you sign up, you create a "rookery" of four birds. Each bird has a different delivery speed based on how fast that animal actually travels in nature. Pick a falcon and your message arrives quickly. Choose a hummingbird and it takes longer. Pick a snail or turtle and your message crawls. The app does not offer any way to speed things up, and there is no paid option to skip the wait.

This slowness is built into the app by design. There is no premium tier to buy back time, at least not in any reporting so far.

The viral moment

For the first month or so, Roost stayed small, with around 10,000 users. Then a single post on Threads changed everything. User @_karenlewis shared a video of her daughter using Roost with friends to send messages written in fake Elizabethan English. The post resonated. Within three days, the user base jumped tenfold to 100,000. It has kept growing since TechCrunch. The app also has an active presence on TikTok under the handle @roostapp TikTok.

This pattern—slow growth followed by one big moment that triggers a rush—is familiar to anyone who watches social apps. It has happened many times over the past decade.

Privacy by default

Unlike many social apps, Roost takes a cautious approach to privacy. When you sign up, the app only shares your city with other users. If you want to share your exact location, you have to opt in separately to a "close friends" feature. It does not turn on this level of sharing automatically TechCrunch.

What makes this different

Roost belongs to a category of apps that deliberately avoid some of the features that make social apps addictive. Apps like BeReal prompt you to post only once a day. Apps like Poparazzi ban selfies. They are built on the idea that removing features, rather than adding them, can offer something fresh.

What sets Roost apart is that the friction comes from physics itself. A message sent by falcon travels at a different speed than one sent by snail, and you choose which when you hit send. In most messaging apps, since the smartphone arrived, the goal has always been to make messages arrive as fast as possible—push notifications, read receipts, typing bubbles, all designed to close the gap between the moment you think of something and the moment it lands. Roost inverts that. It suggests the speed of delivery is not a problem to fix, but a choice to make.

Whether this idea actually keeps people using the app over time is a different question than whether it is clever design. These are not the same thing.

What happens next is unclear

This matters: apps that go viral from a single social post often see that growth flatten just as fast. BeReal, another anti-engagement app, had a similar spike a few years ago and eventually leveled off. What will count as real success for Roost is whether the 200,000 users it added in the weeks after the Threads post actually stick around and keep using it. The reporting so far does not include numbers on how many users open the app daily or stay active, only total sign-ups. Those retention numbers would tell us much more than the growth rate alone.

There is also something worth thinking about in how the app got its moment. A teenager and her friends used it to write to each other in old-fashioned English. That is partly just kids being playful with something new, the kind of thing any parent has seen happen with technology. But it might also say something about how a generation that has never known a world without instant messaging might look at slowness differently. For them, waiting is not a bad thing that needs fixing—it might be a novelty, even a feature. That is speculation, though, and there are only a few hundred thousand Roost users so far. It is too early to draw big conclusions from one viral moment.

The open questions

For now, Roost is a small product built by one founder. The reporting does not disclose how the app makes money, whether it has received funding, or how it handles moderation and safety at scale. Mendelsohn still works at Ticketmaster. What determines whether Roost becomes more than a viral flash depends on decisions about money, content moderation, and expansion that have not yet been reported. Those decisions are still ahead.