# What an app is

> An app is the files your coding agent published, answering at a link of its own. Publishing again makes a new version and leaves the old version's link working.

Part of the reachpad docs: https://reachpad.dev/docs. Rendered page: https://reachpad.dev/docs/apps. Last checked 2026-09-04.

## The link

Every app has a slug, and the app answers at `https://<slug>.reachpad.app/`. A slug is the name, lowercased, plus a random 5-character tag: `todo-k8f2m`. The tag is why two people can both call an app Todo and get a working link each, with neither one made to look like a copy. It is at most 40 characters of a-z, 0-9 and single hyphens, and you can pick the readable half yourself.

> Note: Two hyphens in a row are reserved for version links: `https://todo--v3.reachpad.app/` is version 3 of `todo`. A slug cannot contain `--`, and a handful of names a mail server or a browser would ask for first, such as `www`, `api` and `mail`, are not available either.

## What can be in one

- A page. HTML, CSS, images and scripts, with `index.html` answering at the root of the link.
- A document. Markdown, rendered to a page, with the Markdown kept beside it so a later read gets back what was written.
- A file. Anything else, behind a page that names it and its size.
- A server. One JavaScript module that exports `default { fetch }`, called for every request to the link.

The badge on the row in your list (app, page, doc or file) is a label for the people reading that list. What actually answers a request is set on each version: `page` serves the files, `function` runs the module.

An app that shipped a page in version 1 and a server in version 2 is still one app, on one link.

## Where your apps are listed

[reachpad.dev/apps](https://reachpad.dev/apps) lists every app in your organization, newest first, with folders, starred apps, a shared-with-me list and a trash. Your organization comes from your email address: a company address puts you with everyone else at that domain, a personal address gets an organization of its own.

Reachpad asks you to verify your email address before you can publish or be given access to anything, because an invitation names a mailbox and nothing else.

Folders hold apps and other folders. Deleting a folder never deletes an app: a folder with anything still in it refuses to be deleted, so move the contents out first.

Moving an app to the trash stops its link answering. Restoring it puts the link back. Deleting it from the trash removes the app and its versions for good.

## The ceilings

| Limit | Value |
| --- | --- |
| Apps in one organization | 200 |
| New versions of one app | 60 an hour |
| People one app is shared with | 100 |
| Files handed over inside a publish call | 2 MB in total |
| A snapshot uploaded instead of handed over | 50 MB |

Each refusal names its own number, so a call that hits one says which ceiling it hit.