Progressive Web Apps


Originally appeared on

So you might have heard about Progressive Web Apps being the “new hot thing”, but what are they really? According to they are reliable, fast, and engaging. But is this just nonsense made up by Google, or is this the new way to create experiences for interacting with the web, the biggest platform of applications known to man, in terms of users? Thanks to a great presentation by Jon Kuperman (@jkup), which I saw recently at a ForwardJS conference, I now know that PWAs have begun to earn users’ trust all over the world, by being more performant than other web apps that do not meet the “Progressive Web App standard”.

What is this standard exactly? For one, PWAs will never act like something is wrong when an asset can’t be downloaded from the host or when an API call is taking too long. This is because they attempt to employ all means possible to not ruin your experience by utilizing things like the cacheing system, local storage, and service workers, to keep you in an immersive experience for as long as possible. This is especially important since users’ attention spans seem to plummet every decade. PWAs always use HTTPS, load quickly on your browser, and even work when there is no network connection at all. They also tend to be more user friendly by asking users how they want to interact with the app in a “progressive” way, such as asking for permissions to use native device features, and falling back gracefully to a still-usable UX if such requests are denied.

But are PWAs ready for the World Wide Web? While Chrome and Firefox have taken steps to support PWAs, other browsers like Safari are still behind the ball. It is up to the PWA right now to fall back gracefully when being used on an older browser. You can get a nice progress page on PWA features’ support (broken down by browser) by going here:

It does seem that PWAs are the future, considering that you don’t need to browse some app store to download them. Instead, they can be easily saved directly (and immediately) to your home screen via a browser link. In fact, app stores and other similar collective applications are actually including them in their catalogs, because PWAs have become “first class citizens” in the application world. In any case, the decoupling of apps that can provide “native-like” experiences from the app stores they have mostly been found on in the past, has allowed us to skip the commercial mumbo-jumbo (and sometimes payments) that are normally associated with downloading native applications. Emerging markets, such as those found in countries where the network carriers can only provide 2G networks, also stand to gain a lot from PWAs. This is because PWAs perform so well under poor network conditions, and are expected to work in a minimal way, even when there is no network available at all. Oh and PWAs can also do push notifications, provide APIs for sharing things natively, and offer full screen experiences. Sold yet?

But how does one make a PWA? This is done by including a manifest JSON file in your application, in which you provide information on things like application name, screen orientation, icons, background, etc… Basically, this file allows you to control how your app appears and how it is launched. A great site/library for getting started with PWA development, Workbox, can be found here:

If you have already built a Progressive Web App, Google’s Lighthouse is a great tool to measure how “up to standard” your PWA really is. Lighthouse assesses how fast your “time to interactive” is for your application, as opposed to the normal “time to first byte/render” for web apps, because PWAs pride themselves on delivering a decent, usable experience, as quickly as possible to the users. Lighthouse is available as a Chrome plugin and you can start using it to measure you PWA’s performance right away, via the DevTools’ Audit tab.

The future of web apps is here folks, and Progressive Web Apps are the new way to provide great application experiences to the users, no matter how many bars they have on their network.

Jeff Poyzner