A basic MVP app in the UK starts at around £500 with Appin500. Most UK agencies quote between £5,000 and £50,000 or more for a comparable first version, not because the work is harder, but because they scope for a full feature set upfront instead of one focused core function.

That gap is the single most confusing part of app development pricing. Here’s what actually drives it.

Why app development costs vary so much

Two developers can quote wildly different prices for what sounds like the same app, because they’re not actually scoping the same thing. One is pricing your full, finished vision, every feature you mentioned, every “nice to have”, built and polished before launch. The other is pricing the one workflow that proves your idea works, and leaving the rest for later.

What actually drives the price up

  • Number of screens and user flows, more screens means more design and development time
  • Backend complexity, a simple database is cheap, real-time features and complex logic aren’t
  • Third-party integrations, payments, maps, messaging APIs each add scoping and testing time
  • Platforms, native iOS and Android separately costs more than one shared cross-platform build
  • User accounts and roles, sign-in, admin dashboards and multiple user types all add scope
  • Revisions and scope changes, the most common reason a fixed quote turns into a moving target
2026 REALISTIC COST MATRIX

A Realistic Cost Breakdown

Fixed Scope vs Agency Retainers

  • FASTEST TURNAROUND Starter (Appin500)

    One core function · 3–5 screens · One platform

    From £500 7–14 Days

  • MOST POPULAR Launch Package (Appin500)

    iOS & Android · Sign-in · One integration

    From £999 Several weeks

  • FULL PRODUCT Custom Build (Appin500)

    Payments · Admin dashboards · Marketplaces

    From £1,999+ Scoped individually

  • TRADITIONAL STUDIO UK Digital Agency

    Comparable first version

    £5,000 – £50,000+ 3–6 Months

All Appin500 tiers include 100% full IP code ownership and zero monthly platform lock-ins.

What you get for £500 with Appin500

A focused first version isn’t a stripped-down demo. It’s a real, working app covering one clear problem, with a proper UI, a working database where needed, and full source code handed over at the end. What it doesn’t include is everything your app might eventually need, that’s deliberate, and it’s the reason the price is what it is.

Hidden costs to budget for, regardless of who builds it

  • Apple Developer account

    Around £79/year.

  • Google Play Developer account

    A one-off fee, currently around £21.

  • Hosting & backend services

    If your app needs a live database.

  • Third-party subscriptions

    Such as payment processing or messaging APIs.

How to keep costs down without cutting corners

Start with the smallest version that still does one real job for a real user. Get it in front of actual people before spending more. Add features based on what they actually use, not what you assumed they’d want. That’s the whole logic behind starting from £500 instead of £5,000.