Custom app development
You have the idea. You do not need to know whether it is an app.
Most people arrive describing a problem, not a specification. Working out whether the answer is a web app, a piece of AI, a SaaS product or a much smaller thing than they feared — that is the first part of the job, and it happens before anyone quotes you.
Custom app development means software built for your business rather than rented from someone else’s. It exists to do one job properly: the thing your business does that no off-the-shelf tool has ever quite handled, because the tool was built for a general case and you are not one.
The usual trigger is a workaround that has grown teeth. A spreadsheet three people maintain. A process that only works because one person remembers the order. A service you deliver by hand that would reach ten times as many people if it ran itself.
What actually gets built
Almost always a web application first — something that opens in a browser, works on a phone, and needs no download and no app store approval to ship a fix. It is faster to build, cheaper to run, and it reaches everyone.
Underneath, the ordinary furniture of real software: accounts and logins, a database that is genuinely yours, file storage, payments where money changes hands, and an admin view so you can see what is happening without asking anyone.
- A service you deliver by hand, turned into software other people can use
- A SaaS product with accounts, billing and paying customers
- An internal tool that replaces the spreadsheet holding your operation together
- AI built into something you already run, rather than bolted alongside it
- The first working version of an idea you need to test before you commit to it
Built by a marketer, not a dev shop
A development agency builds what you asked for. That sounds like the right thing until you realise that most briefs are wrong in the same way — they specify a feature when what was needed was an outcome.
Twenty years of launching things is what tells you which features people will actually use, what the thing should cost, and how it gets sold once it exists. That judgement is the product. The build is how it is delivered.
It is also why the questions here start with your business rather than your feature list.
What your budget actually buys
Ranges, not a price list.
The honest version, because the alternative is a form that says “contact us”.
- Around £5,000
- One job, done properly.A focused tool with a single clear purpose. Accounts, a database, one workflow that works. Usually the right first move for testing whether people want the thing at all.
- Around £10,000
- A real product, launched.Multiple connected workflows, payments, an admin view, and the polish that separates something you can sell from something you can demo.
- Around £30,000
- A platform with a business on it.Subscriptions, an AI engine doing meaningful work, integrations with the tools you already run, and the operational plumbing that keeps it standing once real users arrive.
- Every month, after
- Typically £20–£200.Hosting and database are usually tens of pounds a month. Anything with AI in it also has a usage cost that scales with how much people use it — modelled honestly before you commit, never discovered later.
The evidence
The studio’s own product, built the same way it would be built for you.
The boring answers
Asked and answered, without the discovery call.
How much does custom app development cost in the UK?
A focused tool that does one job well starts around £5,000. A sellable product with payments and multiple workflows is nearer £10,000. A platform with subscriptions, AI and integrations runs from £30,000 upward.
There is also a VIP Co-Build Day at £2,000–£6,000, which is the right answer when what you actually need is to get something working and see it, rather than to commission a project.
I have an app idea — where do I start?
Not with a specification, and not with a developer quote. Start by describing the problem and who has it, out loud, to someone who will tell you if the answer is smaller than you think.
Very often it is. A great many "app ideas" turn out to be a two-screen web tool, and finding that out costs a conversation rather than a project.
Will I own the code and the intellectual property?
Yes. You own the code, the database, the accounts and the intellectual property in what is built for you. It is written into the agreement rather than implied.
That includes the ability to hand the whole thing to another developer and walk away. A build you cannot leave is not a build you own.
Is no-code good enough, or do I need custom development?
No-code is genuinely good, and if it does the job you should use it. Nobody should pay for a custom build to do what an off-the-shelf tool already does.
It stops being enough at three points: when the thing you sell is the software itself, when your workflow is the bit that makes you different, or when per-user pricing on a platform starts costing more each year than owning the thing would have.
Being told no-code will do is a perfectly normal outcome of the first conversation here.
Do I need an iPhone and Android app, or a web app first?
A web app first, almost every time. It works on every phone, needs no download, and ships a fix the moment it is ready rather than after an app store review.
Native apps earn their cost when you genuinely need push notifications, offline use or device hardware. Most businesses do not, and paying to be in an app store nobody browses is an expensive way to feel legitimate.
How long does a custom build take?
A focused tool is weeks. A sellable product is a few months. A platform is longer, and it does not go faster by adding people to it.
The first working version always arrives sooner than expected. The distance between working and sellable is where projects actually go.
Tell me what you are trying to build.
Describe the problem rather than the specification. Working out what it actually needs to be is the first part of the job.