I have been a dev for some years now, but I can't wrap my head around what exactly is a PWA.
For example, if an app runs on a mobile phone it is a native app. I can point to it and tell people that "look it is a native app."
In a similar sense, what is a PWA? Where does it run? Which app can I point to and tell that it is a PWA?
From what I have read on the web I feel that a PWA is a website that has modern technologies and gives a "native app like" experience to the user.
Is my understanding correct?
All in all, it is a website that has native-like experience?
If so how does a user separate a normal website form a PWA?
The concept of the progressive web app (PWA) was approached by Google in late 2015. They are basically web applications (Website) but have look and feel like other native mobile apps. The progressive web app enabled websites can offer functionalities such as working offline, push notifications, and device hardware access.
Benefits of the progressive web app:
1. Smaller and Faster:
The progressive web apps are much smaller in size than native apps. They don’t even need to install. That’s they are not wasting disc space and load very fast.
2. Responsive Interface:
Progressive web app (PWA) supported web pages are capable to fit in every screen sizes automatically. It could be a smartphone, tablet, desktop or laptop.
3. No Updates Required:
Most of the mobile apps need regular weekly updates. Like the normal website, progressive web apps (PWA) are always loaded latest updated version whenever the user interaction happens and no App or Play Store approval required.
4. Cost Effective:
Native mobile apps need to be developed for both Android and iOS devices separately and their development cost is very high. On the other hand, progressive web apps are had the same features but the fraction of the prior price.
5. SEO Advantage:
Progressive web apps are discoverable by search engines and load super-fast. Just like other websites, their links are sharable too. This, in other words, gives good user experience and result in SEO rank boost.
6. Offline capabilities:
Due to the support of service worker API, PWAs are accessible in offline or low internet connections.
7. Security:
PWAs are delivered over HTTPS connection and secure user-data over each interaction.
8. Push Notifications:
By the support of push notifications, PWAs can interact easily with the users and provide a really amazing user experience.
9. Bypass the app stores:
PWAs don’t need the App store or Google play store support. Their updated version can be directly loaded from the web server without the requirement of app store approval. On the other hand, native apps need days of approval if any new update required. There are possibilities of getting rejected or banned.
10. Zero installation:
During browsing, progressive web app gets its own icon on phones and tablets, just like a mobile application, but without the need to go through the tedious and slow App Store installation process.
Disadvantages of the progressive web app:
1. Less access to system features:
Currently, Progressive Web Apps have limited access to native system features than native apps. Also, all browsers are not supporting its full features but maybe in near future, it will be the new standard of development.
2. More Android – Less Apple’s iOS:
progressive web apps are currently, most supported by Android devices. Apple’s iOS is only partially supporting.
3. No review standard:
progressive web apps don’t need any kind of review system which is applicable for native apps from the app store. It may make the process faster but lack of promotional benefits from the app store.
Progressive web app checklist:
The checklist for the progressive web app is extensive. I have described its main few items here.
1. HTTPS
2. Web app manifest - manifest.json
3. Service worker
4. Responsive design
5. App icon
6. First load fast even on 3G
Conclusions:
There are huge possibilities offered for the progressive web app. Although there are lots of features and browser adaptability expected in near future. But, whatever already exists in the market is enough to show a strong mobile presence.
Visit the video blog: https://www.youtube.com/watch?v=NVXP-RzA0Eo
A PWA is a website with certain progressive features, most notably the ability to load offline or in areas with spotty connection, load quickly, display push notifications, and have other native app qualities. The benefits of a PWA is that they run on any browsers (since they're a normal website, if the browser doesn't support PWAs then the user gets a normal website experience), even desktop browsers. On mobile devices, the user will often get prompted to install the web app to the home screen, which happens almost instantaneously and uses barely any data since the website is already loaded. This allows for way more "downloads" than a native app, leading to higher engagement. For another brief overview of what a PWA, Google has some great articles about them.
Technically speaking, a PWA is a website that has two things: a web app manifest file and a service worker.
A manifest is a JSON file (usually called manifest.json) with some information about the progressive web app. It contains information similar to what you would include with a native app. It has the name, the short name for display on home screens, icons, orientation, etc. A web app manifest can be used on any site (even non-PWAs) to give the browser more information and allow the site to create a shortcut on the user's homescreen, but it's required for a PWA. You can read more about it over on the Google Developer's site.
A service worker is a JavaScript file that can be installed by the browser to do certain tasks. This file will be run in the background of the site and can do things like caching resources, intercepting network requests (to do stuff like return data from the cache), receiving push notifications, background synchronization, etc. When a user first visits your site this JS file gets installed and starts running. This is the file that allows for things like offline functionality. You can read more about service workers on the Google Developer's site as well.
Roughly speaking PWA is a web app that has native feeling and can be installed to the users' home screen and can start & work offline with an optional sync to server when Internet connection gets available.
To be considered a Progressive Web App, your app must be:
Progressive - Work for every user, regardless of browser choice,
because they are built with progressive enhancement as a core tenet.
Responsive - Fit any form factor, desktop, mobile, tablet, or whatever
is next.
Connectivity independent - Enhanced with service workers to work
offline or on low quality networks.
App-like - Use the app-shell model to provide app-style navigation and
interactions.
Fresh - Always up-to-date thanks to the service worker update process.
Safe - Served via HTTPS to prevent snooping and ensure content has not
been tampered with.
Discoverable - Are identifiable as “applications” thanks to W3C
manifests and service worker registration scope allowing search
engines to find them.
Re-engageable - Make re-engagement easy through features like push
notifications.
Installable - Allow users to “keep” apps they find most useful on
their home screen without the hassle of an app store.
Linkable - Easily share via URL and not require complex installation.
I think PWA is quite a broad term. I say broad because there are many ways of developing and distributing a PWA. In Layman's terms a Progressive Web App is a 'web site' that is effectively used/displayed like a native app. I believe an example of this would be something like phonegap? where phonegap built an app 'surrounding/scaffolding' and displayed a webpage with some custom CSS over the top. (Editorial Note: Phonegap is not related to progressive web apps. Phonegap creates actual, native applications. Wrapping a website in a native application is very different from progressive web apps.)
Most recently though I've been working on a lot of react only based website which I believe is the closest to PWA you can get at the moment (especially for IOS who only support minimal feature to encourage you to build native apps for their app store).
But yea it's basically an app like app that's not an app; rendering from a web page :thumbsup:
Progressive Web Apps (PWAs) are web apps that follow a set of guidelines
Starts fast, stays fast
Performance plays a significant role in the success of any online experience, because high performing sites engage and retain users better than poorly performing ones. Sites should focus on optimizing for user-centric performance metrics.
Works in any browser
Users can use any browser they choose to access your web app before it's installed.
Responsive to any screen size
Users can use your PWA on any screen size and all of the content is available at any viewport size.
Provides a custom offline page
When users are offline, keeping them in your PWA provides a more seamless experience than dropping back to the default browser offline page.
Is installable
Users who install or add apps to their device tend to engage with those apps more.
For more details see What makes a good Progressive Web App?
Related
We have a website, and a react-native based iOS and Android apps that present that website in a mobile app (with push notifications). If we have the website send the messages through a single G- measurement id, in GA dashboard it shows web as the platform 100% of the time. Is the best way to manage the platform value to create multiple streams? We have different apps for different audiences, so it would be hard to maintain that many new multiple streams for each app. Is there a way to populate Platform in a different way?
I see when we are in the app, the browser value is like Safari (in-app) or Android Webview. But that doesn't tell us app or if the website is in a social media app. I am thinking the best way to proceed is to make a custom dimension for knowing if the user is inside the app. Is that the best way forward for us?
Assuming I integrate Agora in my website (PC + mobile hybrid app that wraps a mobile-web site).
Will it be able to listen for users joining a channel while the client is not browsing the website?
Meaning, can it work inside a service worker on both PC and mobile?
I need a reliable way to have voice calls between users on my web application even when they are not using the website.
If you create a WebView or just open an iframe of the website then the user's video is turned off when the app is closed even if the microphone permissions are off.
The user is still on call and can track people joining but as soon as you close the browser, your video stream disappears for the other users.
To have background based workflow, I recommend you use the native SDKs for the app as well as desktop applications and implement them with the same App Id to maintain consistency.
An alternative solution is to use the RTM SDK as the RTM SDK allows you to send messages even in the background if the user is logged in and has joined the channel.
I am at the moment researching about the new features of progressive web apps and they are pretty amazing and allow building web apps which are feeling very native. In particular, I'm considering at the moment to build a purely web based, installable calling app. Most features for something like that exist already:
Audio and video calls are very simple to do with WebRTC.
Using service workers and the push API, it is possible to send push notifications to a web app which is not even opened currently: https://developer.mozilla.org/de/docs/Web/API/Push_API
Web apps are becoming installable and can add themselves to your home screen: https://developer.mozilla.org/en-US/Apps/Progressive/Installable
Nevertheless, for building a serious calling app working on a mobile phone, it is necessary to be able to unlock/wakeup the screen of the phone in case of an incoming call. I unfortunately couldn't find anything out about a possibility for doing that; even not with features which are at the moment still considered as "experimental". Does anybody know if it is possible to do that at the moment, just using web technologies? And if not, if in the near future there are plans in browser technologies to allow something like that?
In my opinion, this is something which should be possible (at least in the future), since this would enable developers to build progressive web apps which are having more features and are even closer to native apps.
Currently there is no API that fit your requirement, the best thing you can do is to send notification continuously when someone call you (which I have seen in many other apps).
The most recently feature a web page can do when the phone is sleeping is to play background music or control the volume (MediaSession). But that is only in experiment stage.
I'm not sure allowing a webpage to "wake up" the phone from sleeping state is a good idea. The web move forward but there are things that should be handled by native apps.
I am about to start building a mobile site which is dynamic, working from a lot of dynamic content which must come from the database.
I have already written a REST API for the site which the IOS and Android applications are using to interact with the information.
My question is what would be the absolute best practise for building this site, would it be:
1- Make the mobile classes an extension of the existing site functions
(The downside I see here is that the mobile site would be dependant on the main site library meaning that any bad heat on the main site would also affect the mobile site)
2- Make the mobile site a completely stand alone site running from itself
(The downside I see here is that any change to the main site library will need to be reflected here so in essence we would almost be writing code twice)
3- Make the mobile site run from the REST API and standalone
(The downside i see here is just increased number of HTTP requests for the information rather than communicating with the server directly)
Each one would function normally and there wouldn't really be any problem there, coding is really not too difficult, though if I make it standalone I would need to recreate a lot of the functions from the main site and adapt them for the mobile site which isn't ideal.
Look forward to your comments! Thanks
I would go with 3rd point, but that needs to be architect well.
We will prioritize standalone application after that API, also we can have 2 way communication, any content changed on server it will coordinate with clients to get that updated.
Also I would also suggest go with Bootstrap framework, its an awesome framework and have responsive and adaptive design
I'm trying to understand how programs like PhoneGap and Adobe Air work, that allow you to 'write once and run anywhere' on mobile platforms. The way I understand it now is that you build your application as a web app using either HTML5, or flash, or I don't know what, and it takes in those files and converts them to the proper types for each mobile OS. Assuming this is correct, what I would like to know is, what the options for developing web apps that are able to be converted into apps are; and what the most popular platforms to use/learn flash, or html5, or JavaScript, or I have no idea what are.
I want to build a web app to deploy across multiple phone platforms, but I don't know where to start. Thanks for the help!
You use tools like PhoneGap to access native device API's through JavaScript. If you don't need access to these API's you can write a HTML5 app and install it using "Add to home screen" etc.
As HTML5 matures, more and more of the device API's are actually directly available through HTML5 (for instance GPS), so depending on what you want to do access it might be in/scheduled to be part of the Device API.
Write once and run anywhere
There are different frameworks that lets you deploy to multiple platforms through the device specific install process. These tools usually work in 2 ways. Run in an embedded browser, or compile to native code.
PhoneGap runs the HTML5 part of your app in an embedded browser. Other tools like MonoTouch actually cross-compiles to native code, so they run on the bare metal.
Cross platform using HTML5
There are plenty of frameworks you can use to make mobile apps with HTML5. These usually help make the app "feel native", and includes abstractions over device specific idioms that differ between the different devices.
Popular frameworks includes Sencha Touch, JQuery Mobile and a bunch of others.
If you want the users to install the app through the AppStore/Market etc. then a solution like PhoneGap is a good option. If you don't care about that you can write your app and add a meta tag like
<meta name="apple-mobile-web-app-capable" content="yes">
and when you add it to the home screen it'll look just like any other app and run in an embedded browser without the browser window etc. You can add offline capabilities using HTML5 and synch when users go on-line etc. all just using HTML5.
Have a look at the Sencha touch app gallery to see what is possible with this technology.