What Does Your User Agent Say About You?


A user agent is a computer program representing a person, for example, a browser in a Web context.

Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web. Along with each request they make to the server, browsers include a self-identifying User-Agent HTTP header called a user agent (UA) string. This string often identifies the browser, its version number, and its host operating system.

Spam bots, download managers, and some browsers often send a fake UA string to announce themselves as a different client. This is known as user agent spoofing.

The user agent string can be accessed with JavaScript on the client side using the navigator.userAgent property.

A typical user agent string looks like this: "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0".


User Agent String

Browser Data

User Agent Iphone

Daniel Brown
• Friday, 25 December, 2020
• 9 min read

We've got 1.2 million users agents for software running on iPhone. It's easy to search the millions of user agents we've got with the API.

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We've had to do this because otherwise we get constantly overrun by inconsiderate or malfunctioning bots which overload the system. As such, we're forced to block traffic from popular web hosting companies, VPNs and Proxies, we also rate limit requests and have some other checks too.

The web server can then choose to send customized content to that device. I’ve been.getting page errors on a variety of sites when using both safari and edge browsers.

I also got Disallowed Provider Error when trying to connect to my Azure account for school. And I don’t recall installing any Web kits.

Making statements based on opinion; back them up with references or personal experience. It also provides the granular level of detail required by Programmatic Advertising for more effective targeting and bid pricing for ‘real’ users.

Page layouts can be optimized for specific screen sizes and input methods. Testing and development times can be reduced by separating out different groups of devices.

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The following JavaScript snippet shows how to implement the logic to determine these iPhone categories in practice. However, the pixel density can be used to differentiate the older iPad versions from the newer ones.

For iPad more information to distinguish between larger screen and mini variants would be beneficial. Our preferred method to detect different Apple devices is to use the 'WEBGL_debug_renderer_info' extension.

The JavaScript code snippets shared below can run on client browsers, require no external calls to any 3rd party sites. If using the 51Degrees solution this can be run server-side, allowing you the fastest detection possible.

iPhone and iPad device detection process overview WEBGL_debug_renderer_info extension is part of the WebGL API and exposes two constants for debugging purposes, which are 1. Vendor of the GPU and 2. The renderer names. Depending on the privacy settings of the browser, this extension might only be available to privileged contexts.

Of course, this method is only possible as long as Apple don’t block this information in the future. JavaScript code snippet for iPads you are testing this method and require some assistance, please do not hesitate to contact us.

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Newer models of devices have more advanced CPUs and can therefore perform iterative calculations more rapidly than older versions. For each device, web browser and algorithm 1000s of tests were conducted under four different conditions.

Tests were also conducted on different browsers, including Chrome and Opera. Although the majority of iPhone /iPad users will be using Safari, this usage drops to about 80% in China.

Results Data was captured from 100,000s of tests and is available in its raw form for download at the end of this blog. The following analysis highlights the key findings and comments on the usefulness of the results for device detection purposes.

To reduce the permutations illustrated in the subsequent analysis only Take will be used as it has a smaller standard deviation. Take response times of iPhone 4 & 4S on Safari 7.1These devices are older and as such the accuracy is reduced.

Due to the age of these devices, some of them do not support the latest Safari version. If all the results are shown then the graphs will appear like the chart for iPhone 4s with an exponentially decaying curve.


As these devices are older, some of them will not support the newer Safari browser versions making it difficult to compare them. The same device produced slightly different results from one test cycle to another.

In practice the surrounding components connected to the CPU, such as heat sync exchanges, do degrade resulting in slower response times for older devices. CPU stress testing results in slower page loads, even as great as 1/2 second and drains the battery more rapidly.

This will save you a lot of time and will make testing web pages a snap. Once it has completely launched, look towards the Apple Toolbar.

You will see a button labeled Advanced, click on this option. From this drop-down menu, hover over the Sergeant option.

Check back soon for more Apple related content. Obsessed with tech since the early arrival of A/UX on Apple, Suez (SK) is responsible for the editorial direction of AppleToolBox.

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He is based out of Los Angeles, CA. Suez specializes in covering all things macOS, having reviewed dozens of OS X and macOS developments over the years.

In a former life, Suez worked helping Fortune 100 companies with their technology and business transformation aspirations. Some sites let you change the default and save it as a cookie.

You can't change this for Safari but there are other browsers you can download from the app store that have this feature. I use immobile and it has several browser ID's to choose from.

Is there a full list of browsers anywhere which allow you to change the user agent ? I am unsure of which browsers allow this, although just do a quick google search and you'll get tons of apps.

My suggestion is try scrolling down to the bottom of the page. Sometimes, you'll be able to click a button that says something like classic mode or view full version or disable mobile site.

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Some sites don't offer this, but there are a bunch that do have this option. “Settings” for cab Mobile allows one to select the “Browser ID” from a list of common web browsers, or to select your own.

It also includes control over cookies, and filter options to get rid of annoying ads. I bought this thinking that I could watch full episodes of the Colbert Report if I used the Mac Safari user agent, but after setting cab up that way the Colbert site still recognized my iPad as a mobile device and limited access to full episodes available on my mac.

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