How much does it cost to develop a mobile app from scratch?

 The cost of developing a mobile app from scratch varies significantly, and I have found that there is rarely a realistic “average price” that applies to every project. When people ask this question, my first thought is usually “What type of app are we actually building?” because the complexity of features, integrations, platforms, and long term goals can change the budget dramatically.

For a relatively straightforward app with limited functionality, such as appointment booking, basic forms, customer accounts, or informational features, I would typically expect costs to start from around £5,000 to £30,000 in the UK. These are usually projects with clearly defined requirements, fewer integrations, and simpler user experiences.

Once an app becomes more feature rich, costs can increase quite quickly. For example, if I am building an app with user logins, payment systems, notifications, admin dashboards, location tracking, messaging, booking systems, subscriptions, or API integrations, I would generally expect budgets to move into the £30,000 to £80,000+ range, depending on the scope.

For larger scale or highly customised apps, particularly platforms involving marketplaces, AI features, real time communication, fintech functionality, healthcare systems, or enterprise workflows, I have seen development costs exceed £100,000 or even several hundred thousand pounds. At that stage, businesses are not simply paying for an app interface, they are investing in architecture, scalability, compliance, performance, testing, and ongoing infrastructure.

One factor I think businesses often underestimate is that app development is not only about building screens. When I break down the costs, I usually look at areas such as:

• Product strategy and discovery
• UX and UI design
• Front end and back end development
• Database architecture
• API integrations
• Security and compliance requirements
• Testing across devices and operating systems
• App Store and Play Store deployment
• Ongoing maintenance and updates

I also think platform choice affects cost quite a lot. If I build for both iOS and Android separately using native development, the investment tends to be higher because there are effectively two codebases to maintain. If I choose cross platform frameworks, development can become more cost efficient, although the right approach depends on the app’s technical requirements and performance expectations.

Another thing I always consider is whether an app genuinely needs to be built fully from scratch. In some situations, businesses can launch a more focused minimum viable product (MVP) first, validate demand, and then expand gradually. I have found this approach reduces risk because it helps avoid spending heavily on features customers may never actually use.

One mistake I often see businesses make is focusing only on the cheapest quote. In reality, lower costs at the beginning sometimes lead to expensive redevelopment later if performance issues, poor scalability, technical debt, or weak user experience become problems. I usually view app development as a long term investment rather than a one off project.

If I had to give a realistic expectation for UK businesses in 2026, I would say most professionally built mobile apps typically fall somewhere between £20,000 and £100,000+, depending on functionality and ambition. For me, the better question is often not “How much does an app cost?” but “What problem is the app solving, and what level of investment makes commercial sense for the business?” because that usually leads to more practical decisions.