Web Design Agency London

Web App Design is where some of the most interesting user experience challenges exist to be solved.

Innovative ideas can turn out to be great if they have the right help along the way. But ideas or business people don’t always possess the experience to progress that into a valid concept, or have done so already and realised what comes out the other end is more complicated than they first thought. That’s where we come in.

Whether a web app is complicated or incredibly simple, the same level of care and attention needs to be applied to ensure a usable product is delivered.

At Every Interaction we help clients develop an idea into a tangible web app concept for proof of concept, prototyping, user testing, following through into development and QA, including ongoing iteration.


Our whole ethos revolves around understanding customer journeys and we are passionate about creating ways to deliver your message effectively. HTML5 is a core markup language we use for building web apps with responsive and accessible templates, along with all the latest JavaScript frameworks and CSS standards, providing functionality to users above and beyond traditional websites.



How We Work

We can slot into your development cycle if required to sync up with sprints and ensure the team has the assets needed to tackle the stories ahead. Equally we’re conformable sticking to a waterfall approach and resolving the core user experience in advance of any development. Whether you are working Agile, Scrum or other methodologies we’re used to adapting our internal processes to sync up with clients. We can work with our dev team to provide web apps, or with your existing internal or partner teams.

web design agency

We know a satisfying experience keeps customers coming back, which is why we aim to optimise your content or functionality to make it as effective as possible. HTML5 web apps enable fluent integration of experiences and technologies, whilst adhering to reasonable browsers support, so users won’t need endless plugins. Using this technology, we’ll create individually tailored web app design and innovative UI to enhance user engagement.



Our USPS & Key Benefits 

The individual job requirements always dictate how we work. Every Interaction knows that each project is different and that off-the-peg design doesn’t always cut the mustard. That’s why we’re constantly evolving our skill set, and only work with the most up-to-date technologies. This ensures every project is delivered with long-term value and is as future-friendly as possible.


Our experienced London-based team can help with all your web app design needs, from taking the lead at the conceptual stage to consulting on existing products. We really understand user experience, allowing us to maximise interaction for increased engagement and project success. Read more about working with us.


Typical HTML5 web app design projects

Below are a few recent Web App Design projects that we think are great examples of what we do, they each have their own challenges that make them unique. View all Web App Design projects.

Other services you may be interested in

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    Product Design

    The ‘Product’ is the website, service, application, interactive thing being worked on by the business. The practice of Product Design is similar in a lot of ways to UX Design. It involves the coming together of many specific design disciplines...

    Call to action (CTA)

    A call to action is a marketing term that refers to a prompt that invokes a response leading to a sale. When referring to a call to action (CTA) in the digital design world we usually mean the interactive element that leads to the next step in the experience - something that needs to be clicked or tapped.

    User testing

    User testing refers to a technique used in the design process to evaluate a product, feature or prototype with real users. There are several reasons why you might want to undergo usability testing, the most common is that it allows the design team to identify friction in a user experience they are designing, so that it can be addressed before being built or deployed.


    WYSIWYG (pronounced WIZ-ee-wig) is an acronym for "What You See Is What You Get". It helps identify an an interface that allows user input resulting in an output that is rendered in a similar way. For example; a word processor application interface might resemble a piece of paper,so when printed the user can see how the output will appear.

    Content Management System

    A content management system (CMS) is an tool that allows a website editor/administrator to manage the content that is displayed. Websites are made of HTML and CSS to create pages. Pages can be hard-coded but would require technical development skills to make changes. A CMS usually allows a person without coding knowledge to amend existing and add new content to a website using a WYSIWYG interface.

    Responsive Web Design

    Responsive web design refers to a web page that dynamically adapts its layout to fit the size and orientation of the device on which it is viewed. A responsive design allows for a more optimised user experience across desktop and laptop computers as well as smartphones and tablets of varying sizes.

    User Stories

    User stories allow the functionality of a product or service to be expressed as written descriptions of an experience as seen from the users perspective. The writing of user stories creates a list of design and development tasks to complete in order to create any required functionality.

    User Interface

    A user interface (UI) is a conduit between human and computer interaction - the space where a user will interact with a computer or machine to complete tasks. The purpose of a UI is to enable a user to effectively control a computer or machine they are interacting with, and for feedback to be received in order to communicate effective completion of tasks.


    A persona in UX Design is the characterisation of a user who represents a segment of your target audience. On a project you might create any number of personas to be representative of a range of user needs and desires. The solutions you design must answer these needs in order to deliver value to your target audience.

    Card sorting

    A great, reliable, inexpensive method for discovering patterns in how users would expect to find content or functionality. Card sorting is used to test the taxonomy of data with a group of subjects, usually to help inform the creation of the information architecture, user flow, or menu structure on a project.


    A technique used to generate ideas around a specific topic. Often done in groups, but can be done individuals. The process usually involves writing down all ideas around a topic onto paper, a whiteboard or stickies often implying some kind of association.

    Minimum Viable Product

    An MVP is a product that has the minimum set of features to prove the most essential hypothesis for a product. Businesses building a new product can create a Minimum Viable Product to prove that an idea is viable and warrants further investment. A further benefit being that the next stage of development can be informed by feedback obtained from testing that MVP.


    A sitemap is a diagrammatic representation of a hierarchical system. It usually depicts the parent-sibling relationship between pages in a website, showing how sub pages might be arranged underneath their parent groupings. This arrangement forms a map of the site.

    User journey

    A user journey represents a sequence of events or experiences a user might encounter while using a product or service. A user journey can be mapped or designed to show the steps and choices presented as interactions, and the resulting actions.


    A prototype is draft representation built to test ideas for layout, behaviour and flow in a system. Prototypes are an indispensable tool for resolving a large number of potential issues in a concept or business before too many resources are deployed to put a design into production.


    A Wireframe is a visual schematic that conveys a basic level of communication, structure and behaviour during the design of a system. Wireframes are low-fidelity designs that bypass including a detailed user interface or visual design, conveying just enough to get across the core idea.


    To say something is usable is a qualitative statement about how easy that thing is to use. Usability is an assessment of how learnable a system is and how easy a user finds it to use. The usability of a system or product is a key factor in determining whether the user experience is a good one.

    Information Architecture

    Information architecture is the design and organisation of content, pages and data into a structure that aids users understanding of a system. A more organised system enables users to more easily find the information they require and complete the intended tasks.

    UI Design

    User Interface Design is the discipline of designing software interfaces for devices, ideally with a focus on maximising efficiency, responsiveness and aesthetics to foster a good user experience.

    UX Design

    The practice of User Experience (UX) Design is the coming together of many specific design related disciplines to improve the usability, responsiveness, uptake and aesthetics of a product or service.

    User Experience

    A general term that covers all aspects of a user's participation while engaging with something that has been designed. Usually when talking about User Experience in the digital design field it refers to the interactions, reactions, emotions and perceptions while using an app, service, website or product.