App design and development agency in London

We begin with a Discovery phase where we define your objectives, scope the application correctly and quote it accurately.

This phase typically takes 1–2 weeks and costs between £5K–£15K. What you receive is a clear scope, MVP definition, backlog, milestones, estimates and risk list.

All you have to do to begin is share your concept with us so we can confirm Discovery is a good fit for you.

Costs depend on scope, complexity and platforms. As a guide: Design & Prototype £3,000–£10,000, Proof of Concept £8,000–£15,000, MVP build £15,000–£50,000. Pre-production consultation is free. Ongoing support and growth retainers start at £1,000 per month.

Final cost depends on platforms (iOS, Android or both), backend complexity, design depth, security requirements and test coverage. Our quotes include planning, design, build, QA, release and documentation. They do not include third-party software, store fees or services from other providers.

Share your concept and we will come back with a tailored estimate.

The average MVP requires 12–24 weeks; a full product takes roughly 6–12 months. We suggest 1–2 weeks for discovery and 8–16 weeks for MVP build.

The main factors that hold back speed are scope confusion, approval delays, integration difficulties, and QA and app store review. Send us your three core flows and we can outline a more realistic milestone-based timeline.

We estimate by mapping user flows and acceptance criteria, then turning that into milestones.

We need your goal, target users, must-have flows, key integrations, deadline, budget boundaries and any existing designs. We'll give you a feature list, milestones, a timeline range, a budget range, assumptions and risks, usually within 5 to 14 days.

Scope is agreed up front with clear change control so you always know what's shipping and why.

You can build a small prototype yourself, but if you want a real product you'll need an agency or a team.

Build it yourself when you need something with low risk and don't mind if it crashes. Hire an agency when you want quality, speed, security, App Store reliability and predictability. An agency will handle architecture, QA, release process and long-term maintenance for you.

Once you know what you need and what your constraints are, we can help you find the fastest way to get there.

We're not just an app development company — we're a senior-led product engineering studio that works closely with you as a delivery partner.

We handle strategy, UI/UX design and engineering with transparency. We believe in setting clear goals and making decisions based on key performance indicators, so you always know what's going on and what to expect.

The quickest and most affordable way is a small Proof of Concept (PoC) or a tiny Minimum Viable Product (MVP). Which one depends on what's holding you back — technical risk or whether people will actually want what you're offering.

If it's the technical side, a PoC is the way to go: usually 2–4 weeks, £15,000–£40,000. If you're worried about demand or retention, a tiny MVP is better: typically 8–12 weeks, £40,000–£80,000.

Tell us who your idea is for and what problem it solves, and we can suggest the fastest way to validate it.

Not every company needs an app. Sometimes a good website is enough.

You probably do need an app if you rely on push notifications, offline use, or device features like camera or GPS, or if you have a loyalty program and want customers coming back.

You probably don't if it's a one-off or occasional service and your website can handle everything. If you don't need device functionalities, a website may be fine. Describe what you do and how often customers will use it, and we can help you decide.

It's possible, but it depends on what you need. If you're looking for real app features, we can do that. Sometimes a Progressive Web App (PWA) or a simple wrapper around your existing website can be enough.

If you need something more complex, we can build a native or cross-platform app. We usually connect the new app to your existing backend — same authentication, data model, analytics and so on.

Things to consider: authentication, payments, offline syncing, performance, and permissions. If you've got a web product and some goals, send it our way and we'll advise what will work best.

Yes, we can turn your design into an app. We'll need you to share your design with all the details: flows, screen states, APIs, copy, and your plan for analytics.

Many designs don't include empty states, error states, permission states, and edge cases — all important for development. Share your Figma link and we can tell you if it's ready to move forward.

We build for a variety of platforms — both native and cross-platform. We deliver for iOS and Android, and if needed we also handle backend and admin panels.

Native is usually best when you need maximum performance, complex UX, or heavy use of device APIs. Cross-platform is better when speed and code reuse matter and the app follows standard UI patterns.

Tell us about your users and we can propose the optimal stack for your project.

Yes. Our service includes bug fixing, OS updates, monitoring, small improvements, and release management. We charge a monthly fee, typically £5,000–£20,000 depending on how quickly you need us to respond.

For existing apps we need an audit first to avoid unknown risks. The audit usually takes 1–2 weeks and costs £5,000–£15,000. Tell us how many users you have and your risk appetite, and we can suggest a support plan.

Yes, if a correct handover and takeover audit is performed and there are no hidden risks.

Takeover usually includes access handover, release auditing, code quality scanning, dependencies review and a stabilisation plan. A standard takeover audit takes 5–10 days and costs between £5K and £15K.

Once you tell us what access you have, we can present the full takeover plan.

Sometimes that's the best option, especially when the problems are deep and patching doesn't make sense.

You might need a rebuild if the architecture is flawed, there are no tests, things keep breaking, scaling is hard, or there's serious security debt. You might get away with refactoring specific modules if the core is solid but some parts are in bad shape.

We usually start with a technology audit (5–10 days, £5,000–£15,000). After that we can advise whether to rebuild or refactor.

Our main office is in London, and our engineering team is spread across Europe. We've worked with companies in London, the UK and internationally.

We're flexible: we can work remotely or on-site. We use weekly meetings, collaborative tools and open communication so everyone stays on the same page.

The best type depends on the single core flow that drives revenue or reduces cost. Common types include customer-facing apps, internal operations apps, marketplaces and companion apps.

Tell us your top user action and we can map the best app type and MVP scope.

Yes, but we start with a technical audit first. We check architecture, test coverage, release pipeline, crash data, performance and dependencies. This helps us understand the codebase and plan features without introducing risk.

Share repo access and we will propose a feature plan with risks and timelines.

We stabilise first, then scale. Stabilisation includes monitoring, crash triage, hotfix process, automated tests and performance profiling. For scalability we look at backend bottlenecks, caching, database tuning, queueing and rate limiting.

Share your crash rate and usage patterns and we will propose a stabilisation sprint.

Yes. Our security audits cover authentication, data storage, API security, dependency risks, logging and monitoring. We deliver a prioritised remediation plan so your team or ours can fix the most critical issues first.

Tell us your platform and compliance needs and we will propose the audit scope.

We sell outcomes and reliability, not just code delivery. We start with discovery, deliver in milestones, enforce QA discipline, provide clean handovers and offer ongoing support.

Every project is led by senior developers — not account managers or juniors. You get direct access to the people building your product.

Monday–Sunday 06:00–23:00. We also have a 24/7 hotline for emergencies.