Everything you need to know about building a minimum viable product — what it is, what it costs, how long it takes, and how to get it right.
An MVP — minimum viable product — is the simplest version of your app that solves the core problem and lets you test it with real users. It's not a prototype or a mockup. It's a real, working product with just enough features to validate your idea before you invest heavily.
The number one reason startups fail is building something nobody wants. An MVP lets you find that out for £5,000 instead of £50,000. You test your core assumption, get real feedback from real users, and then decide whether to invest more — based on evidence, not guesswork.
Only the features that are absolutely essential to solving the core problem. Everything else goes on the roadmap for later. A good rule of thumb: if removing a feature means the product doesn't work at all, it stays in the MVP. If the product still works without it, it goes in version 2.
For most apps, a solid MVP includes:
Things that can usually wait for version 2: admin dashboards, social features, advanced analytics, multiple user roles, and integrations with other services.
With a focused scope and a solo builder like me, most MVPs take 2–4 weeks. With a small agency, expect 6–12 weeks. With a larger agency, 3–6 months isn't unusual. The difference is decision-making speed and process overhead.
| Builder Type | Typical MVP Cost | Timeline |
|---|---|---|
| AI-native solo builder (me) | £3,000–£8,000 | 2–4 weeks |
| UK freelancer | £5,000–£15,000 | 4–8 weeks |
| Small UK agency | £15,000–£40,000 | 8–16 weeks |
| Mid-size agency | £40,000–£100,000 | 12–24 weeks |
Building too much. The most common mistake. You don't need 20 features for version 1. You need one feature that works brilliantly.
Spending too long on design. A clean, professional design is important. A pixel-perfect, custom-animated masterpiece is not necessary for an MVP. Get the UX right, keep the visuals clean, and move on.
Not launching. The perfect is the enemy of the good. Launch when the core works, even if you're not 100% happy with everything. Real user feedback is worth more than another week of polishing.
Choosing the wrong builder. A £100K agency isn't the right partner for a £5K MVP. Match your builder to your stage and budget.
Book a free strategy call and I'll help you figure out what should be in version 1, what it'll cost, and how fast we can get it live.
Book a free 30-minute strategy call. I'll give you an honest assessment — what it'll take, what it'll cost, and whether I'm the right fit.