App development · City of London
App development in City of London
You need a mobile app that works under real load, passes compliance review, and solves a problem your users actually face. We build apps for the Square Mile's finance, insurance and legal sectors—from tight scope through to ongoing support.
App development for City of London businesses
Hubb Group is a digital agency and software company. Our studio is in Dubai and we work with UK clients remotely, on UK hours, with a named lead on every project. Contracts and invoices are issued by our UAE company, in pounds.
We measure app performance against your business goals: user retention from week one, crash rates under load, and compliance checkbox completion. Monthly dashboards show installs, active users and feature adoption. Your compliance team can audit the data. We don't guess at ROI—we show what's happening in your app.
Every project is a fixed quote with a clear timeline and clear milestones. You own the work and the accounts outright when we're done — no lock-in, and nothing you can't take with you.
Sectors we work with in City of London
- Banking and financial services
- Insurance and broking
- Legal services
- Asset management
- Fintech and regulated advisers
- Compliance and regulatory consulting
Apps that survive App Store review and compliance sign-off
The Square Mile moves fast but doesn't cut corners on governance. Your app has to clear App Store and Play Store review on the first submission. That means accessible interfaces, no undisclosed tracking, and transparent permissions. We build to those rules from the start, not as an afterthought. Your compliance and legal teams see the specification before development begins.
We scope mobile apps tight. A narrow MVP that solves one problem well beats a sprawling feature list that delays launch and complicates review. You know what your users need. We translate that into a viable product, built for speed and built to last.
Backend architecture that keeps your data secure and offline-ready
A mobile app is only as good as what runs behind it. We build backends that handle the data flows your app needs, integrate with your existing systems without replacing them, and keep client information secure. APIs are documented, versioned, and designed to scale. Your infrastructure team gets a clear handover.
Clients in regulated sectors need offline capability. If your users work on trains, in meetings or in areas with poor connectivity, your app still works. Data syncs when the connection returns. We design that behaviour into the app architecture from the beginning, not as a patch later.
Native and cross-platform: the right choice for your users
iOS or Android first? Both? Swift or React Native? The choice depends on your users, not on fashion. We assess where your users actually are, what capabilities you need, and what timeline suits your business. If your audience is primarily iOS, we build native. If you need both platforms fast, cross-platform can make sense. You get the reasoning, and the honest trade-offs.
Performance matters in the Square Mile. Apps on financial services, compliance and legal workflows have to be responsive, reliable and fast. We measure app startup time, frame rates and battery impact. Your users will notice. So will your compliance team, because a slow app looks unfinished.
Launch is not the end. Support and iteration keep your app useful.
New OS versions arrive, APIs change, App Store policies tighten. An app you ship and abandon falls behind within months. We offer ongoing support: monitoring, minor updates, compatibility testing and small feature iterations. You get a partner who watches your app, not a vendor who moved on.
Usage data tells you what works. We measure installs, retention, crash rates and feature usage. That intelligence goes to your product team so you know what to build next. Support includes regular check-ins on performance, security patching, and guidance on seasonal updates.
Everything we deliver includes
Scoped to ship
A first version people will actually open, priced before the build starts.
Store review handled
App Store and Play requirements — privacy, account deletion, demo logins — dealt with.
Works on a bad connection
Offline behaviour and accessibility treated as requirements, not polish.
Fixed prices
A clear quote and timeline up front — no open-ended retainers, no surprises.
A named lead
One person who knows the build, on UK hours, not a ticket queue.
Yours to own
Code, signing keys and store listings in your name.
App development in City of London — common questions
How do you handle App Store and Play Store compliance from the start?
We build to both platforms' review standards during development. That means accessibility, permission transparency, and clear data handling. Your app gets reviewed by our team before submission to catch issues early. Most submissions pass first time.
Do you integrate with existing banking, insurance or legal systems?
Yes. We integrate with the platforms your firm already uses—core banking systems, client management tools, document stores. Integration sits in the spec before development begins. We don't replace your systems. We extend them into mobile.
What happens after launch?
We monitor performance, handle compatibility updates, and support minor feature additions. You get monthly or quarterly check-ins on usage and stability. Your app stays current as iOS, Android and your own business evolve.
How do you scope mobile apps in regulated sectors?
We work backwards from what your users need to do, not from a wishlist. Tight MVP scope means faster delivery, easier compliance review, and clearer ROI. Your legal and compliance teams see the specification early. That saves surprises later.
Who approves the app before it goes live?
Your compliance, legal and product teams do. We build the review step into the timeline. Approval sits alongside development, not after it. That means your sign-off happens before App Store submission, not after rejection.
How do you measure whether the app is working?
We track installs, daily active users, session length, retention and crash rates. Your compliance team gets a dashboard they can audit. We report what matters: whether users come back, where they drop off, and whether the app stays stable under load.
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Need app development in City of London?
Tell us what you need and we'll come back with a fixed quote and a timeline — usually the same day.