Mobile App Development Company in London UK

Mobile app development in London costs £5,000 to £30,000+. A basic MVP costs £5,000–£8,000 and takes 2–3 months. A mid-complexity app with custom UI, third-party integrations, and a backend costs £10,000–£25,000 over 4–6 months. Enterprise apps with AI, IoT, or ERP integrations start at £30,000 and run 6–12 months. Winklix provides itemised fixed-price or time-and-materials quotes after a free 30-minute consultation.

Mobile app development in London takes 2 to 12 months. A simple app with basic features takes 2–3 months. A mid-complexity app with custom UX, third-party APIs, and a backend takes 4–6 months. Enterprise apps with compliance and complex integrations take 6–12 months. Winklix delivers in 2-week agile sprints, with a working build reviewed every fortnight.

Yes. Winklix develops native iOS apps in Swift and SwiftUI, native Android apps in Kotlin and Jetpack Compose, and cross-platform apps using Flutter and React Native. For most new projects we recommend Flutter or React Native to reduce cost by 30–40%. For regulated industries like fintech and healthcare we recommend native development for maximum performance and security control.

Winklix serves fintech, healthcare, retail and ecommerce, logistics, enterprise SaaS, real estate, and media. Our London team has delivered 2,000+ apps since 2014, including projects for AT&T, Boeing, Burberry, HDFC Bank, and OnTheMarket. We have passed security and compliance audits for Fortune 500 clients and are experienced with GDPR, PCI-DSS, and HIPAA requirements.

Yes. Winklix offers 3-month, 6-month, and annual post-launch support packages. Support covers bug fixes, iOS and Android version compatibility updates, performance monitoring, App Store and Play Store policy compliance, and new feature sprints. Support packages start from £1,500/month for active maintenance and scale based on response-time SLAs.

Yes. App modernisation is one of Winklix's core services. We perform a technical audit of your existing codebase, migrate to a modern stack (e.g. Objective-C to Swift, or legacy hybrid to Flutter), redesign the UI to current standards, and improve App Store ratings through performance and stability work. A typical audit takes 5–10 business days and costs £2,000–£5,000.

Yes. Winklix signs a mutual NDA before any detailed project discussion. Your concept, business logic, and technical specifications remain confidential. We have signed NDAs with Fortune 500 clients including AT&T, Boeing, and HDFC Bank, and handle commercially sensitive information under standard UK contract law.

Winklix follows a six-stage process: Discovery & Requirements (1–2 weeks), UX Design & Prototyping (2–4 weeks), Sprint-Based Development (2-week sprints), QA & Testing, App Store Submission, and Post-Launch Support. You receive a working demo every sprint and have a dedicated project manager as your single point of contact throughout.

Contact Winklix via the form on this page or WhatsApp at +44 2037697122. We schedule a free 30-minute scoping call within 24 hours. After the call, we send a Project Requirements Document and a fixed-price or time-and-materials quote within 5 business days. There is no cost or obligation at the scoping stage.

A London-based app company provides defined contractual accountability, a full delivery team (project manager, designer, developers, QA), and post-launch support, which freelancers cannot match. Freelancers carry high delivery risk: they may become unavailable mid-project, lack expertise across design/backend/QA simultaneously, and offer no contractual recourse. For projects above £5,000, hiring an agency is significantly lower risk than any individual freelancer.

Choose native iOS/Android development when your app needs maximum performance, deep device hardware access, or operates in a regulated industry like fintech or healthcare. Choose cross-platform (Flutter or React Native) when you need to launch on both iOS and Android with a single codebase, reduce development cost by 30–40%, and your app uses standard UI patterns. Winklix recommends Flutter for new MVPs targeting both platforms and native development for performance-critical apps.

Flutter uses Dart and ships with its own rendering engine, producing pixel-identical UI across iOS and Android with near-native performance. React Native uses JavaScript/TypeScript with platform-native UI components and integrates well with existing web teams. Flutter has stronger UI consistency; React Native has a larger ecosystem of third-party libraries. For UI-heavy consumer apps Winklix recommends Flutter; for apps where existing web developers contribute code, we recommend React Native.

Yes. Winklix transfers full source code ownership and intellectual property to the client on project completion. All code repositories, design files, API documentation, and credentials are handed over with no vendor lock-in. This is standard in our Master Services Agreement and applies to every engagement model — fixed price, time and materials, or dedicated team.

UK GDPR requires that mobile apps collecting personal data have lawful basis for processing, provide clear privacy notices, implement data subject rights (access, deletion, portability), and ensure data security through encryption and access controls. For apps handling health data, financial data, or children's data, additional compliance requirements apply. Winklix builds GDPR compliance into the discovery phase of every UK project, including consent flows, data minimisation, and privacy-by-design architecture.

Yes. Winklix is a certified Salesforce Partner and ServiceNow Specialist Partner. We build native integrations between mobile apps and Salesforce CRM, Service Cloud, Sales Cloud, Marketing Cloud, and ServiceNow ITSM platforms. Integrations are built using official APIs (REST, SOAP, Streaming, Bulk) and follow platform security requirements including OAuth 2.0 and field-level encryption.

The cheapest way to validate a mobile app idea is a Proof of Concept (PoC) or lean MVP. A PoC costs £3,000–£8,000 and validates technical feasibility in 2–4 weeks. A lean MVP costs £5,000–£15,000 and validates user demand with real users in 6–10 weeks. Winklix offers a free 30-minute discovery call to help you decide which approach fits your goal.

Winklix works with both startups and enterprises. Our startup clients account for approximately 40% of projects, with MVP engagements from £5,000. Our enterprise clients include AT&T, Boeing, Burberry, HDFC Bank, VMware, and Coles Group. Startups get the same dedicated project team, senior developer access, and IP ownership as enterprise clients — the only difference is project scope.

London mobile app development typically costs 15–25% more than other UK cities due to higher overhead and a denser senior developer market. A mid-complexity app costing £15,000 in Manchester typically costs £18,000–£20,000 in London. Winklix combines London delivery oversight with a hybrid offshore engineering team to deliver London-quality apps at 30–40% below typical London agency pricing.

Winklix follows OWASP Mobile Top 10 standards and ISO 27001 security practices. Every project includes secure code review, penetration testing before launch, encrypted data storage (AES-256), TLS 1.3 for all API traffic, certificate pinning, and runtime application self-protection. For regulated industries we add HIPAA, PCI-DSS, or FCA-specific controls as required by your compliance team.

Yes. Winklix offers dedicated developer hiring on monthly, quarterly, or annual contracts. You interview candidates, select your team, and they work exclusively on your project under your direction. Monthly rates start from £3,500/month per developer depending on seniority and specialism. This model suits clients with ongoing product development needs and is fully replaceable with no notice penalty.