iOS and Android app development
Cross-platform in React Native or Flutter for most apps, native Swift and Kotlin where hardware, performance or platform features demand it.
Mobile App Development · London (Dagenham)
Mobile App Development in London
iOS and Android apps designed and built for London businesses and startups, with the backend, store compliance, UK payments and data protection that make an app runnable after launch.
An app is the visible tenth of a system. Behind it sit APIs, a database, authentication, notifications, payment reconciliation, an admin panel and the integrations with whatever the business already runs. London apps that fail after launch usually fail there: a backend that could not handle the launch, an admin panel nobody built, or a privacy label that got the app rejected.
Infynix Solutions designs and builds mobile apps for London businesses and startups with all of that in scope: the app, the backend, the admin tools, store compliance, analytics and the support that follows. Cross-platform in React Native or Flutter where that fits, native where the requirements demand it, decided on the facts in discovery.
We work with consumer brands and hospitality groups building loyalty and ordering apps, property and service businesses building field and customer apps, healthcare providers building patient apps, and startups that need a senior mobile team without hiring one.
How we work
- 01
Discover
A paid discovery phase producing a scoped roadmap you own outright.
- 02
Architect
Data model, integrations and infrastructure agreed before code.
- 03
Build
Fortnightly demos, working software, no black box.
- 04
Hand over
Your repositories, your infrastructure, documented.
Mobile app development services in London
Backend and API development
Documented APIs, databases, authentication and notifications built on Node.js or Python, hosted in UK regions.
Admin panels and operations tools
The screens that make an app runnable day to day: content, users, orders, support and reporting.
Payments and subscriptions
Stripe, Apple Pay, Google Pay, in-app purchases and subscriptions with reconciliation and the store rules respected.
App Store and Google Play compliance
Store setup, policy, privacy labels, review handling and release management as part of delivery.
Analytics, monitoring and support
Events, funnels, crash reporting and a maintenance plan for OS and store policy changes.
What a London app build includes
UK GDPR and privacy labels
Consent, data minimisation and the App Store and Play privacy declarations handled accurately.
Offline and poor-signal behaviour
Apps that work on the Tube and in basements and sync when the connection returns.
UK payments
Stripe, Apple Pay, Google Pay and subscription billing with reconciliation built in.
Accessibility
Dynamic type, contrast, screen reader labels and touch targets handled.
Analytics from day one
Events, funnels and crash reporting configured before launch.
Full handover
Source, store accounts, signing keys, backend and documentation in your name.
Typical scope and timeline
| Engagement | Timeline |
|---|---|
| Discovery and prototype | 2 to 3 weeks |
| MVP app, iOS and Android | 8 to 12 weeks |
| Customer app with backend and admin | 12 to 20 weeks |
| Field or workforce app | 6 to 12 weeks |
| Ongoing product team | Monthly |
| Support and store maintenance | Monthly |
Apps we build most often in London
Loyalty and ordering
Own-brand apps for hospitality groups and retailers that keep regulars close and keep the platform commission.
Field and workforce
Inspection, maintenance, delivery and attendance apps for property, facilities and service businesses across London.
Healthcare
Appointment, results and follow-up apps for clinics and practices, with health data handled carefully.
Customer portals
Account, document and payment apps for professional services, lettings and membership organisations.
Startups
Product builds for London startups that need a senior team and a documented architecture the in-house team can inherit.
How we engage
Fixed-scope build
Discovery produces a specification and a fixed price for a defined release.
Product team
A named team shipping releases on your roadmap month to month.
Support and evolution
Store maintenance, OS updates, monitoring and improvements for apps we built or inherited.
Native or cross-platform, decided on the facts
Most London business apps are best built cross-platform in React Native or Flutter: one codebase, iOS and Android, faster releases and lower cost. Some are not: apps that depend on hardware, heavy media processing, background location or platform-specific features may justify native. We decide in discovery on the requirements rather than on a preference, and we say so in writing.
Either way the backend is built on the same engineering practice as our software projects, with APIs documented, hosting in UK regions and integration with the systems the business already runs.
Cross-platform by default
React Native or Flutter for the majority of business and consumer apps.
Native where justified
Swift and Kotlin where hardware or performance demands it.
Backend and APIs
Node.js or Python services documented and hosted in UK regions.
Integration
Connected to your CRM, booking, payment and messaging systems.
The backend, the admin panel and the things nobody budgets for
The app is what the client sees in the pitch. The backend, the admin panel, the notification service, the payment reconciliation and the customer support tools are what make it work in month three. Apps built without them either fail at launch or accumulate a second project to build what was missed.
We scope all of it from discovery, build the admin panel the operations team will actually use, and design the backend for the launch peak rather than the demo.
Admin panel
Content, users, orders, support and reporting screens the team can run.
Notifications
Push, email and SMS with consent handled and preferences respected.
Payment reconciliation
Settlements, refunds and subscriptions reconciled into the accounts.
Scalable hosting
Sized for peak, monitored, backed up, in UK regions.
Launch, the stores and the months after
Shipping to the stores has its own failure modes: policy rejections, privacy label mistakes, signing key mishaps and reviews that stall for weeks. We handle store setup, compliance and submission as part of delivery, and we keep the accounts and keys in your name.
After launch, analytics and crash reporting tell us what to fix first, and a maintenance plan covers OS updates, store policy changes and the improvements that the first real users reveal.
Store setup and compliance
App Store and Play accounts, policies, privacy labels and submission handled.
Analytics and crash reporting
Events, funnels and stability monitored from the first release.
OS and policy updates
Kept current as iOS, Android and store rules change.
Improvement cadence
Releases planned from real usage data.
Field apps for London property and facilities
London has one of the largest property and facilities management sectors in the world, and its inspection, maintenance, compliance and cleaning work still runs on paper and photos in WhatsApp groups. A field app that captures the inspection with photos, timestamps and location, works in a basement plant room without signal, syncs when it returns, and feeds the compliance record and the invoice, removes a layer of admin from every job.
We build field apps offline-first, integrated with the property and job management systems the business already runs, with the admin panel that turns field data into evidence and billing the same day.
Offline first
Works in basements and lifts, syncs when signal returns.
Evidence capture
Photos, timestamps, location and signatures on the record.
Compliance records
Inspections and certificates held against the property.
Billing integration
Completed jobs flow to the invoice without re-keying.
App development for London from East London
Infynix Solutions works from Dagenham and builds apps for businesses and startups across London, with discovery, user testing and launch on site and the sprints between run remotely with demos every two weeks. Engineering capacity comes from our teams in the UK, the UAE and Kochi, which is how a London business gets a senior mobile team at rates that make sense.
The discovery call is free and technical. Bring the idea, the systems it has to connect to and the users it is for, and we will tell you what to build first.
Frequently Asked Questions
How much does app development cost in London?
We do not quote from a rate card. A discovery session establishes the scope, the systems involved and the outcome you are working towards, and the proposal that follows is a fixed price or a monthly retainer for exactly that. If a smaller first phase would answer the question, we say so.
How long does it take to build an app?
An MVP takes 8 to 12 weeks. A customer app with backend takes 12 to 20 weeks. Store review adds a week or two at the end, which we plan for.
Should we build cross-platform or native?
Cross-platform in React Native or Flutter for most business and consumer apps. Native where hardware, performance, background location or platform-specific features demand it. We decide in discovery on your requirements and put the reasoning in writing.
Do you handle App Store and Google Play submission?
Yes. Store accounts, policy compliance, privacy labels, signing and submission are part of delivery, with accounts and keys in your name.
Do you handle UK GDPR for apps?
Yes. Consent, data minimisation, retention and data subject rights are designed into the app and backend, hosting is in UK regions, and the store privacy declarations are completed accurately.
Who owns the app?
You do. Source code, store accounts, signing keys, backend and documentation are handed over in your name.
Can you take over an app built by another team?
Yes, after an assessment of the code, backend and store accounts. We tell you honestly what we find and take it on under a support agreement if it is workable.
Do you provide support after launch?
We do not quote from a rate card. A discovery session establishes the scope, the systems involved and the outcome you are working towards, and the proposal that follows is a fixed price or a monthly retainer for exactly that. If a smaller first phase would answer the question, we say so.
Can you build a field app for our engineers or inspectors?
Yes. Offline-first field apps with evidence capture, compliance records and billing integration are among our most common London builds for property, facilities and service businesses.
How do you handle app analytics and crash reporting?
Events, funnels and crash reporting are configured before the first release so the first real users teach you something, and the maintenance plan uses that data to decide what to fix first.
How quickly can you start?
Discovery can usually begin within two weeks of agreement, and an MVP is typically in the stores eight to twelve weeks after discovery ends.
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Talk to Infynix About Mobile App Development in London
Tell us what you are trying to grow and we will tell you honestly whether we are the right people for it.
39 Becontree Avenue, Dagenham, Greater London RM8 2UH+44 7436 670553 · office@infynixsolutions.co.uk