"Do I need a website or a web app?" is one of the most common questions we get asked, and most business owners asking it have already used a dozen web apps this week without noticing, because a good one just feels like a normal part of the internet. The distinction actually matters commercially: it changes what you should ask an agency to quote, how long a build takes, and what it costs. This guide explains what a web app is in plain English, gives ten examples small businesses use every day, and sets out realistic UK prices for 2026.
The short answer
A web app is a website that lets a user do something, log in, book, order, track, manage, rather than just read something. A brochure site tells people about your business; a web app lets a customer or a member of staff complete a task inside it. In the UK in 2026, a custom web app with logins, a dashboard and API integrations typically starts at £2,500, well above a £950 business website, because it involves real software logic behind the pages, not just design and copy.
What is a web app, exactly?
A web app is software that runs in a browser and does something with data on a user's behalf, rather than simply displaying information. The technical line is blurry (a booking form is arguably a tiny web app), but the useful business line is this: if a visitor can create an account, and what they see next depends on who they are and what they have done before, you are looking at a web app. Google's own progressive web app documentation covers the technical end of this if you want the deeper detail, but for a small business owner the practical question is simpler: does this need to remember the user, or just inform them?
Website vs web app: what is actually different?
A website is largely the same for every visitor. A web app changes based on who is looking at it: a logged-in customer sees their own orders, a staff member sees their own shift rota, a client sees their own invoices. That single difference is why a web app costs more and takes longer to build than a website of a similar size: a website needs design, copy and layout, while a web app needs all of that plus a database, user accounts, and logic that decides what each person is allowed to see and do. We cover the closely related decision between a single landing page and a multi-page site in our landing page vs full website guide, which is worth reading first if you are still deciding what tier of build you need at all.
What are some examples of web apps small businesses already use?
Strip away the jargon and most business owners are using several of these already, either as a customer or to run the business itself.
- Online booking systems with a live calendar, the kind a salon or clinic uses to take appointments
- Customer portals where clients log in to view invoices, order status or project progress
- E-commerce checkout and "my account" areas, where a shopper tracks past orders
- Staff rota and shift-swap tools, so a team can manage cover without a group chat
- AI chatbots and lead-qualifying bots embedded in a site, answering questions and booking calls
- Delivery and logistics tracking dashboards, so a customer can see exactly where their order is
- Membership or subscription areas that unlock content once someone has paid
- Quote and proposal generators that build a document from a form
- Reporting dashboards that show an owner their own sales, bookings or stock in real time
- Internal stock and inventory systems that update automatically as items sell
A real example: what we built for Jahan Gasht
The clearest way to explain a web app is a real one. We built an installable Persian progressive web app for Jahan Gasht, a transport company, that runs its daily operations: role-based dashboards for managers, drivers and factory reps, OTP login instead of passwords, real push notifications, and a driver shift-replacement marketplace where staff can swap cover themselves instead of phoning a manager. None of that is possible on a normal website, because it depends entirely on who is logged in and what they need to do next. On the customer side, GetSettle is another example, a relocation platform that uses AI-powered guidance and resource matching to help newcomers to the UK, with the experience shifting based on the user's own situation rather than showing the same page to everyone.
What does a custom web app cost in the UK in 2026?
At Migap, a custom web app with user accounts, a dashboard and API integrations starts at £2,500, compared with £950 for an eight-page business website or £300 for a simple starter site. The gap reflects real extra work: authentication, a database, and admin logic all take longer to build and test properly than a page of design. Smaller pieces of "app-like" functionality cost less on their own, a booking and scheduling system with calendar integration adds £350 to a normal website, and an AI booking or reception bot starts at £400, so plenty of businesses get most of the benefit of a web app without paying for a full custom build. Full pricing for every tier, including exactly what is and is not included, is on our services page.
Does my business actually need one, or just a good website?
This exact question comes up constantly on Reddit, usually in r/smallbusiness, where the arguments tend to split into two camps: people insisting a custom app is the only way to look serious, and people pointing out, correctly, that most small businesses are paying for engineering they will never use. Both are half right. If your business genuinely needs accounts, logins or a dashboard that behaves differently per user, a web app pays for itself quickly. If what you actually want is a booking form, a gallery and a phone number that is easy to find, a well-built website does the job for a fraction of the price, and buying a web app you do not need is the more expensive mistake of the two. The honest test is whether a user needs the system to remember them between visits; if the answer is no, you probably want a website, not a web app.
Getting started
If you are still not sure which side of that line your business sits on, tell us what you are trying to build and we will give you a straight answer, including telling you honestly if a £950 website would do the job a £2,500 web app was going to be asked to do.
If you already have a website and are wondering whether it is quietly holding your business back, start with a free website audit instead. We hand-review it and tell you in plain English what is worth fixing before you spend anything on something bigger.