How to Make Your Website Fast & Mobile Friendly

Posted on 16. August 2023 by Jan Bunk

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Improving Your Website Speed to Improve App Performance

Since apps created with display your website with a built-in browser (Chrome on Android, Safari on iOS), the speed of your website dramatically impacts the speed of your app. To be exact, it’s pretty much identical. If your website takes one second to load a specific page, the app will also need one second. Because of that it’s very important to make your website as fast as possible.

Measuring Performance with PageSpeed Insights

A good starting point for evaluating and improving your website’s performance is the PageSpeed Insights test. This is a test created by Google which simulates how a user would experience your website in terms of performance (fast or slow). The test simulates both a desktop computer loading your website (with a fast internet connection and lots of processing power) and a mobile device (with a slower internet connection and less processing power). If you want to relate the results from the test to the performance of your app, you most likely want to look at the results for the mobile device, since the app is used on smartphones and tablets.

A screenshot of the performance overview for, which gets a score of 99/100.

At the top, you might also see a section “Discover what your real users are experiencing”. This is the most realistic data, since it’s taken from actual users of your website (collected anonymously by the Chrome browser). Keep in mind that this is only available if there were enough people visiting this page of your website in the past 28 days. If you don’t have that, the simulated performance data works perfectly fine to see how quickly your website loads.

A screenshot of the Core Web Vitals assessment of

Improving your website’s performance also benefits your website’s ranking in the Google search results, since Google ranks faster websites higher (since users prefer that). Aside from happier users, that’s just another benefit of improving your website’s loading times.

When you scroll down a bit on the PageSpeed Insights page you will find suggestions on how you can improve the speed of your website.

A screenshot of the improvement opportunities PageSpeed Insights suggests for

General Suggestions to Improve Website Speed

Here are a handful of tips that can usually minimize the time your website takes to load:

  • Upgrade or switch to a faster hosting package

  • Use less plugins and scripts

  • Optimize images (smaller dimensions, modern file formats like webp) to minimize their file size

Of course there are many other ways to optimize the performance of your website, but these are some general tips that can help almost any website, no matter what software you use to operate your website.

Making Your Website Mobile Friendly

These days mobile devices have become the primary way through which users access the internet. Because of that it’s important to have a mobile friendly website and app. A mobile friendly website ensures that visitors can effortlessly navigate and engage with your content, regardless of the device they are using.

Responsive Design

Responsive design is the cornerstone of creating mobile-friendly websites. It involves designing and developing a website in a way that adapts to various screen sizes and orientations. In other words, the layout and content of the website automatically adjust to provide an optimal viewing experience on devices ranging from small smartphones to large desktop monitors.

Basically it works by making components of your website smaller or larger and moving them around depending on the size of the screen.

Assessing Mobile-Friendliness

Google recognizes the importance of mobile-friendliness and provides a tool for assessing it, similar to the PageSpeed Insights tool we mentioned above. The Google Mobile Friendly Test page allows you to check how mobile friendly your website is. Ideally, you want to see this message after testing your website:

A screenshot of Google's mobile friendly test considering a page as usable on mobile devices.

Common Issues and Fixes

Several issues can hinder the mobile-friendliness of a website. Not all of these can be identified automatically by Google’s test, so keep an eye out for them yourself too.

  • Unreadable text: Text that is too small to read without zooming can frustrate users. Ensuring legible font sizes is crucial for a positive mobile experience.

  • Clickable elements too close together: Buttons and links placed too closely together can lead to accidental clicks. Move them further apart to avoid user frustration.

  • Content wider than screen: Users should be able to navigate your site without needing to scroll horizontally, as it can be cumbersome on small screens. Make sure the elements on your website are not wider than the screen, so horizontal scrolling is not possible/necessary.

  • Lots of pop-ups: Alerts and dialogs that show up automatically can negatively impact the user experience, especially on mobile devices. Sometimes there’s no way to avoid them though (e.g. cookie banners), so make sure to follow these best practices to make them as user friendly as possible:

    • Pop-ups should be easy to dismiss, so don’t use a tiny “X” button that is impossible to hit on a smartphone.

    • Pop-ups should show up immediately when loading the page if possible. There’s nothing more annoying than trying to click a link and just as you click a pop-up shows up and you accidentally click that instead.

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Author Jan Bunk
Written by
Jan Bunk

Hi, I'm Jan! I created in 2019 while studying computer science in university. A lot has changed since then - not only have I graduated, but it's also no longer just me running We've grown to a global, fully remote team and have gathered lots of experience around app development and app publishing. We've created and published hundreds of apps in the app stores, where they've been downloaded hundreds of thousands of times.