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Web app manifest does not meet the installability requirements

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Installability is a core requirement of Progressive Web Apps (PWAs). By prompting users to install your PWA, you allow them to add it to their home screens. Users who add apps to home screens engage with those apps more frequently.

A web app manifest includes key pieces of information required to make your app installable.

How the Lighthouse web app manifest audit fails

Lighthouse flags pages that don't have a web app manifest that meets minimum requirements for installability:

Lighthouse audit showing user can't install the web app from their home screen

If a page's manifest doesn't include the following properties, it will fail the audit:

Caution: A web app manifest is necessary for your app to be installable, but it isn't sufficient. To learn how to meet all the requirements for installability, see the Discover what it takes to be installable post.

Each PWA audit is weighted equally in the Lighthouse PWA Score, except for three manual audits: Site works cross-browser, Page transitions don't feel like they block on the network, and Each page has a URL. Learn more in the Lighthouse Scoring Guide.

How to make your PWA installable

Make sure your app has a manifest that meets the criteria above. See the Installable collection for more information about creating a PWA.

How to check that your PWA is installable

In Chrome

When your app meets the minimum requirements for installability, Chrome fires a beforeinstallprompt event that you can use to prompt the user to install your PWA.

Try it! Learn how to make your app installable in Chrome with the Make it installable codelab.

In other browsers

Other browsers have different criteria for installation and for triggering the beforeinstallprompt event. Check their respective sites for full details:

Resources

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Codelabs

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Learn more and put this guide into action.