Articles + is intended for bookmarking text based content. This means you can save almost any news or blog article for reading later.

It will however not work if you try to bookmark a site's home page, search results, videos, image galleries, consent screens, tweets or other non textual or non semantic pages. In this case, the content can not be determined.

When you bookmark a website, the corresponding page is saved to your device. But before an article appears in your library, it must be processed to extract its plain content. This happens automatically when the app is already running in the background, otherwise only at the next launch.

While many articles can be successfully extracted, the content of some web pages can not be determined.

In most cases, there is simply not enough text available to determine what the actual content is. If you for example try to bookmark a Twitter post, the 280 characters do not represent the main content of the overall page.

If a website has dynamically generated content, the web page source code does not contain any text. Such pages can only be bookmarked with the share extension in Safari, because it allows to directly store the generated page to your device. It will not work if you save a shared link or use a third-party browser like Chrome, Firefox, Opera or Brave.

When you bookmark links to newspaper articles, they often use tracking links or show some kind of consent screen. You would need to save the actual web page of the article instead, because such links or opt-in blockers can not be resolved automatically.

Another case where article extraction can fail are websites with outdated, non-standard or unstructured formats. For pages without semantic markup, it is simply not possible to determine what the actual content is. If text is contained in div or span elements instead of paragraphs, a parser can not know its meaning.

When saving an article, text as well as images are processed and converted to a minimal format.

Like with text paragraphs, images need to be formatted according to official standards as well. In case a website uses non-standard or unstructured formats, such non-semantic images can not be loaded.

Many websites also use so called "lazy loading" images, which are only downloaded when scrolled into view. Articles + supports such images as well, but only if they are implemented according to certain standards. If a website uses some other custom made image loading, it is not possible to determine an image's source.

In contrast to other read it later apps, Articles + allows to also save password or paywall protected pages.

This is however only possible when bookmarking from Safari or integrated in-app browsers, as in this case the page is directly stored on your local device. If you save a shared link or use a third-party browser, a protected url can not always be successfully resolved.