Elgrith London · App development
Design it. Build it. Ship it to the stores. iOS, Android and cross-platform apps with AI features, from first MVP to scale.
FIG 02 · Quick answer
Elgrith’s app developers build iOS, Android and cross-platform apps for London businesses, from first MVP to scale. We design in Figma, build in Flutter, React Native or native code, add AI features and integrations, publish to the App Store and Google Play, and support the app after launch. A London client partner works on UK hours.
Flagship build · Designed and engineered by Elgrith
Proof that we ship AI features: 200+ AI models behind one login and one credit balance, 23+ studios and tools, and MCP and CLI access from Claude, ChatGPT, Cursor and 19+ AI apps.
Why it matters
Official UK research shows where your customers spend their time online, and why app security cannot be an afterthought.
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77%
Ofcom found smartphones accounted for 77% of all time UK online adults spent online on the average day in May 2025, up from 75% a year earlier.
Source: Ofcom, Online Nation 2025(opens in a new tab)02
41
In the same Ofcom report, UK smartphone users used 41 apps a month on average. A new app has to earn its place on the home screen.
Source: Ofcom, Online Nation 2025(opens in a new tab)03
43%
The UK Cyber Security Breaches Survey 2025 found just over four in ten businesses had experienced a breach or attack in the previous 12 months. Security belongs in the first sprint.
Source: UK Cyber Security Breaches Survey 2025(opens in a new tab)What you get
Consumer apps, business apps and MVPs for iOS and Android, with the back end, admin panel and AI features they need, built in your own repository.
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Deliverables
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Native or cross-platform?
There is no single right answer. We recommend the approach that fits your app, your users and your budget.
| Factor | Native (Swift and Kotlin) | Flutter | React Native |
|---|---|---|---|
| Codebases | One per platform | One shared codebase | One shared codebase |
| Language | Swift (iOS), Kotlin (Android) | Dart | JavaScript or TypeScript |
| Access to new OS features | First, as soon as Apple and Google ship them | Through plugins or platform code | Through libraries or native modules |
| Look and feel | Each platform’s own components | Consistent custom UI on both | Native components on each platform |
| Best for | Heavy device features, top performance, platform-specific apps | Custom, brand-led UI on iOS and Android | Teams already using React on the web |
Our Flutter vs React Native guide goes deeper. We confirm the approach in your written scope before any build starts.
Process · 6 steps
Clear phases, a test build in your hands at the end of every sprint, and code in your repository from day one.
Goals, users, features and risks, mapped in workshops on UK hours. It ends with a written scope and a fixed quote.
User flows, wireframes and a clickable Figma prototype you can test with users before a line of code.
Working builds on TestFlight and Google Play testing tracks at the end of every sprint, so you try the app as it grows.
Manual and automated testing on real iPhones and Android phones, plus accessibility and security checks.
We prepare the listings, privacy labels and review notes and submit to the App Store and Google Play from your accounts.
Crash monitoring, OS updates, fixes and new features after launch, planned with your client partner.
What you get
No prices on this page, on purpose. Every project gets a written scope and a fixed quote after a free call, so you know the full cost before work starts.
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UK compliance and quality by default
Apps collect personal data, so privacy and security are part of the design, not a launch-week scramble. We build to UK GDPR and the Data Protection Act 2018, write the data flows down for your privacy notice, design to WCAG 2.2 for accessibility, and run the kind of security checks you would expect for Cyber Essentials, such as secure configuration, access control and patching, before every release.
Working with a London team
A client partner at our London center runs your account on UK time. Your app is designed and engineered at our New Delhi headquarters, 4.5 to 5.5 hours ahead. Our core hours, 10:00 to 19:00 IST, cover your morning and early afternoon: about 4.5 hours of shared working time in winter and 5.5 hours in summer.
One person owns your account from the London center: scope, priorities, reviews and sign-off. You never chase a ticket queue.
Kick-offs, reviews and demos are booked in your morning or early afternoon, by video. Written updates follow every call.
Design, engineering and QA happen at our New Delhi headquarters, the team behind 1,000+ projects since 2015.
Sessions run remotely by default. If your project needs an in-person workshop in London, we agree it in the scope first.
Live: today’s working days in London and New Delhi, adjusted for British Summer Time automatically.
Your team
Client partnership
UK & Europe · Client partnerships
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Headquarters
Headquarters · Design & engineering
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Elgrith in London
Startups, scale-ups and established firms across London use Elgrith to design, build and run their apps with one team.
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Founders need an MVP that real users and investors can download. We design it, build it, ship it to both stores and keep improving it as you learn.
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Financial, property and professional firms use apps for client portals, bookings and field teams, with the security and data protection that clients expect.
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Loyalty, shopping and booking apps that connect to your ecommerce platform, CRM and payments, so the app adds to the business rather than sitting beside it.
Launch checklist
Store review is where many apps stall. We prepare every item before submission.
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Industries
The sectors London clients most often bring to us, and what we build for each.
4 audiences
Fintech
Account, payment and portfolio apps designed around security, clear consent and accessible design.
Health
Booking, tracking and patient communication apps, with personal data handled under UK GDPR.
Retail
Shopping, loyalty and click-and-collect apps connected to your store, stock and CRM.
Property
Viewing, tenancy and learning apps that replace paperwork and email chains with one clear journey.
FAQ
What London businesses ask us about app development.
It depends on the platforms, the number of screens and features, the back end and integrations, any AI features, and whether you need native or cross-platform code. We do not publish prices. After a free call we send a written scope with a fixed quote in GBP, so you know the full cost before work starts.
Book a free call. We will map the features, recommend native or cross-platform and send a written scope with a fixed quote.
Free 30-minute call · London
Pick a day. You'll choose a time in your own time zone on the next step.