Production websites
Next.js / React. SEO-ready, performance-tuned, accessibility-aware. Built to handle real traffic and convert.
Service
Web, Mobile & iOS App Development
Production web, mobile, and iOS apps for businesses ready to scale.
Production websites and mobile apps, including native and cross-platform iOS, for businesses that have moved past no-code builders and their limits. Built to handle real traffic, real customers, and real maintenance. AI features wired in where they add value.
Part of KUMO's Custom Software practice. See our full custom software development page →
Where we focus.
Six application areas where this service ships measurable results, chosen against the failure modes most growing businesses hit.
Mobile apps (iOS + Android)
React Native or native where the product requires it. Production deployment, App Store launch, ongoing operability.
Internal tools & dashboards
Custom dashboards, admin panels, ops tools for your team, faster than no-code platforms can deliver at the level you need.
Marketplace & multi-sided platforms
Two-sided UX, search and discovery, payments, dispute and review flows, supply-and-demand operations. Built for the messy edges no-code can't cover.
B2B portals & admin consoles
Role-based auth, complex reporting, configurable workflows, audit logs. The kind of software your customers' ops teams actually use day-to-day.
Performance & accessibility audits
WCAG compliance, Core Web Vitals optimisation, conversion-funnel fixes. Concrete metrics, not vague design opinions.
iOS app development
iOS app development, from build to App Store
KUMO builds and ships iOS apps to the App Store, cross-platform with React Native or fully native in Swift where the product calls for it. Flickd and ButtonSimple both shipped to iOS and Android, Flickd as a React Native app built in three months.
React Native or native, decided per product
React Native when you want iOS and Android from one codebase; native Swift when the product needs maximum performance or deep platform APIs. KUMO builds both and picks per product.
App Store release discipline
App Store Connect setup, submission, and staged rollout, so a launch is a controlled event and not a gamble on review timing.
TestFlight beta
Internal and external TestFlight builds for real-device testing and stakeholder sign-off before the public release.
App Review handling
We prepare for App Review, respond to rejections, and keep the app compliant with Apple guidelines through every update.
Related work
Where we've shipped this in production.
CAREGIVING · US ButtonSimple
Dual-mode caregiving mobile app: two distinct user experiences in one product, real-time updates, production iOS + Android.
Read case study ->
FINTECH · INDONESIA + PHILIPPINES FLIN
Fintech mobile app for Indonesia and Philippines markets. Regulated workflows, multi-region launch.
Read case study -> REAL ESTATE · UKSmartMove
UK property-transactions platform: production web product for a complex, multi-party workflow.
Read case study ->
ENTERTAINMENT · UK Flickd
How KUMO built Flickd, a production AI social platform for film and TV fans, founded by an ex-Amazon AI engineer.
Read case study ->
EVENT DISCOVERY · UK Sumwhere
How KUMO built Sumwhere, a mobile event discovery app for industry conferences. Mission Control + personalisation + editorial.
Read case study ->FAQ
Do you build native iOS apps or only React Native? +
Both. We build native iOS in Swift when the product needs maximum performance or deep platform features, and cross-platform with React Native when you want iOS and Android from one codebase. We handle App Store Connect, TestFlight, and App Review either way. Flickd and ButtonSimple both shipped to the App Store.
When is a web or mobile app the right fix vs a no-code MVP? +
No-code and AI builders work well until you need real integrations, performance under load, accessibility, complex auth, or features your platform doesn't support. The signal it's time to move on: your team is spending more time working around the tool than building with it. That's when we step in.
How is this different from working with a one-off contractor? +
Continuity, documentation, and team capacity. A contractor is one person. If they leave, you have no fallback. We work as a team with documented handoffs, code reviews, and runbooks. Your code can be picked up by your in-house team or another partner without rewriting.
Will the site include AI features? +
Where they make sense: customer-service chatbots, AI search, content generation, personalised recommendations. We don't add AI for its own sake; we add it where it measurably improves conversion, support, or operations.
What does a typical web or mobile build engagement look like? +
Production websites ship in 8-12 weeks. Single-platform mobile apps take 12-16 weeks. Cross-platform builds run 12-16 with an App Store launch milestone. Discovery comes first; build is split into two-week milestones with a working preview at the end of each.
Do you maintain it after launch? +
Optional retainer for ongoing development, bug fixes, performance work, and App Store updates. Most clients stay on for an initial 3-6 months to harden the product post-launch.
Tell us what you're solving for.
We'll listen first, ask the right questions, and follow up with a clear proposal.