Did you know the most expensive app ever built cost over £100 million to make. That's more than some Hollywood blockbusters! But here's the thing—most apps don't need anywhere near that kind of budget to be successful. The problem is, when people ask "how much does an app cost?" they're often met with answers that range from £5,000 to £500,000. That's not exactly helpful, is it?
The truth is, asking about app development costs is a bit like asking "how much does a house cost?"—the answer depends on what you're building and where you're building it. A simple utility app might cost you the same as a family holiday, while a complex social platform could set you back more than a luxury car. The wide range isn't meant to confuse you; it reflects the massive differences in what different apps actually do.
Understanding your app's true cost isn't about finding the cheapest option—it's about knowing exactly what you're paying for and why
What makes this topic tricky is that there are loads of hidden factors that affect your final bill. Things like ongoing maintenance, third-party integrations, and backend infrastructure—costs that many people don't think about until it's too late. This guide will break down everything you need to know about mobile app development costs, so you can budget properly and avoid any nasty surprises along the way.
What Makes Apps Cost So Much?
After building apps for over eight years, I still get asked this question almost daily—and honestly, I get why people are surprised by the costs. You download an app in seconds for free, so surely making one can't be that expensive, right? Well, here's the thing: what you see on your phone is just the tip of the iceberg.
Think about what happens behind the scenes. Someone needs to design every single screen, button, and interaction. Then developers have to write thousands of lines of code to make it all work properly. But that's not even half of it—the app needs to talk to servers, handle your data securely, work on different phone sizes, and get approved by Apple and Google.
It's Not Just One App
Here's something most people don't realise: you're not building one app, you're building at least two. One for iPhones and one for Android phones. They use completely different programming languages and have different rules. It's like having to write the same book twice, but in different languages.
The Hidden Work Nobody Sees
The real cost comes from all the stuff you never see. Testing the app on dozens of different devices, setting up secure servers, creating admin panels, writing documentation, and fixing bugs. Plus, once it's live, you need ongoing maintenance and updates. All of this adds up quickly, which explains why professional apps cost what they do.
The Big Three That Drive Your Budget
After years of quoting mobile app projects, I can tell you that three main factors will make or break your budget. Get these wrong and you'll be scratching your head wondering where all your money went. Get them right and you might just have some cash left over for marketing.
The first big cost driver is features—what your app actually does. Every button, screen, and function costs money to build. A simple login screen might take a day to code, but add social media login options and you're looking at several days of work. Payment systems, push notifications, and user profiles all add up fast.
The Three Budget Drivers
Design complexity comes second. A basic interface with standard elements costs less than custom animations and unique layouts. Think about Instagram versus a simple note-taking app—one clearly needed more design hours than the other.
Technical requirements round out the trio. Do you need offline functionality? Real-time updates? Integration with third-party services? Each technical challenge requires specialist knowledge and testing time, which means more developer hours and higher costs.
Write down your must-have features versus nice-to-have features before getting quotes. This simple exercise can save you thousands by keeping your scope focused.
Simple Apps vs Complex Apps
Right, let's get straight to the point here—not all apps are created equal. You've got your simple apps that do one thing really well, and then you've got your complex beasts that try to be everything to everyone. The difference in cost between these two? Absolutely massive.
What Makes an App Simple
A simple app might be a basic calculator, a to-do list, or a simple photo editor. These apps typically have just a few screens, basic functionality, and don't need to connect to lots of external services. Think about it—you open the app, you do the thing you came to do, job done. No fancy animations, no complex user accounts, no integration with seventeen different social media platforms.
When Things Get Complicated
Complex apps are a different story entirely. We're talking about apps like Uber or Instagram—they need real-time data, user profiles, payment systems, notifications, GPS tracking, image processing, and loads more. Each feature adds development time, which means more money. And here's the kicker: complex apps don't just cost more to build, they cost more to maintain too. More features mean more things that can break, more updates needed, and more ongoing support required.
The price difference? A simple app might cost you £10,000-£25,000, whilst a complex one can easily hit £100,000 or more.
Where You Build Makes All the Difference
Here's something that might surprise you—where your app gets built can change your costs by tens of thousands of pounds. I'm not talking about physical locations (though that matters too), but the choice between different development approaches and teams.
Local vs Offshore Development
UK developers typically charge between £400-800 per day, whilst offshore teams might quote £100-300. Sounds like a no-brainer, right? Well, not quite. I've seen plenty of projects that started cheap and ended up costing double because of communication issues, time zone problems, and quality concerns that needed fixing later.
The cheapest quote is rarely the cheapest final bill when it comes to app development
Agency vs Freelancer vs In-House
Freelancers offer the lowest day rates but you're relying on one person's skills and availability. Agencies cost more upfront but bring entire teams with different specialities—designers, developers, testers. Building in-house gives you control but means hiring multiple people with permanent salaries.
The sweet spot? Most successful apps I've worked on used a hybrid approach. Start with an experienced agency or senior freelancer to get the foundation right, then consider bringing development in-house once you understand what you actually need.
Hidden Costs That Catch Everyone Out
Here's the thing nobody tells you about app development—the price you agree on is rarely what you end up paying. I've watched clients go from excitement to panic when they realise their £15,000 budget has somehow become £25,000. It's not because developers are trying to trick you; it's because apps have so many moving parts that even experienced teams can't predict everything.
The Extras That Add Up Fast
Third-party services are the biggest surprise. Want push notifications? That's a monthly fee. Need user analytics? Another subscription. Payment processing, cloud storage, mapping services—they all cost money every month. A simple app might need five or six of these services, and suddenly you're looking at £200+ monthly just to keep things running.
Changes and Updates
Then there's the dreaded scope creep. You'll start building and realise you need something you hadn't thought of—maybe better security, or a feature your competitor just launched. Each change means more development time and more cost. App store fees catch people out too; both Apple and Google take their cut, plus you'll need developer accounts that cost around £80-100 per year each. And don't forget ongoing maintenance—apps need regular updates to stay compatible with new phone versions.
Ways to Keep Your Costs Down
Right, let's talk about the fun bit—saving money! After eight years of building apps, I've picked up quite a few tricks for keeping mobile app development costs under control without cutting corners on quality.
Start Small and Build Smart
The biggest money-saver? Start with what I call a Minimum Viable Product or MVP. Build the core features that make your app useful, then add the bells and whistles later. You can always expand—but you can't un-spend money on features nobody uses.
Write down every feature you want, then circle only the ones people absolutely need on day one. Everything else goes in the "phase two" pile.
Make Strategic Choices
Choose your battles wisely. Custom animations look gorgeous but cost a fortune; stock ones work just fine for most apps. Same goes for complex user registration systems—let people sign in with Google or Apple instead of building from scratch.
The key is being smart about where you spend your budget. Invest in what makes your app unique—everything else can use proven, cost-effective solutions.
Conclusion
After working with hundreds of clients over the years, I can tell you that app development costs don't have to be a mystery. Yes, apps can be expensive—anywhere from £10,000 for something simple to £200,000+ for complex platforms. But now you know why.
The three big drivers we covered—features, design complexity, and platform choice—will shape about 80% of your budget. Whether you're building in the UK, Eastern Europe, or Asia makes a massive difference too. Those hidden costs like app store fees, ongoing maintenance, and third-party integrations? They're not so hidden anymore.
Here's what I want you to remember: start small, think big. Build your MVP first, test it with real users, then expand. Choose your development team based on quality, not just price—I've seen too many projects fail because someone went with the cheapest option. And please, budget for at least six months of post-launch costs.
The app market isn't getting any less competitive, but with proper planning and realistic expectations, your project doesn't need to break the bank. Focus on solving one problem really well rather than trying to be everything to everyone. Your users (and your wallet) will thank you for it.
