Mobile App Development
A UK-based mobile app development team for mid-market enterprises. Native iOS, native Android, cross-platform Flutter and React Native, designed in Figma, built with CI/CD, secured under ISO 27001 controls and shipped to the App Store and Play Store with a co-managed handover.
Free discovery call · UK senior mobile engineers · Fixed-quote MVP in 4 to 8 weeks
Weeks from kickoff to MVP in users' hands
UK mobile apps shipped to App Store + Play Store
Median user rating across our shipped apps
Certified information security controls
The pattern we see
Three problems show up in every mobile app development rescue we run. If any of these sound familiar, your current build is at risk before it ships.
✕
Stakeholders add features mid-build. Sprint goals drift. The MVP that was meant to ship in three months ships in nine, lands tired, and misses the launch window.
✓
Fixed scope, fixed quote, fixed date for the MVP. New features become V2 backlog, not V1 scope creep.
✕
Submission fails on Apple guideline 4.2 or Google Play policy 8.3. The team scrambles to refactor. Launch window slips by weeks, and marketing has already booked the campaign.
✓
Store policy is engineered in from sprint 1, not patched at submission. Median time-to-approval: under 5 working days.
✕
Day-1 crash report lands. The agency is on the next project. Your team owns code they did not write, tooling they never set up, and bugs they cannot triage on their own.
✓
extended co-managed handover: paired engineering, runbooks, dashboards and a documented exit.
Four core capabilities. One UK mobile team.
UX design, native and cross-platform engineering, App Store and Play Store delivery, plus a co-managed handover, delivered as one accountable service by UK senior mobile engineers with one fixed price and one escalation contact.
4-week sprints
User research, journey mapping, Figma prototypes, usability testing on real devices. We agree the scope and the price before sprint 1.
Swift + Kotlin
Swift / SwiftUI for iOS, Kotlin / Jetpack Compose for Android. Native where performance, hardware access or platform feel demand it.
Flutter / RN
One codebase, both stores, when the brief calls for fast time-to-market and consistent UX across iOS and Android.
Day-1 monitoring
App Store and Play Store submission handled. CI/CD, crash analytics, runbooks. Paired engineering with your team for the first 90 days.
How we ship mobile apps
A predictable three-phase delivery so your stakeholders, your store reviewers and your users all get what they expect, on the date we agreed.
01
Days 1 – 4
User research, journey mapping, Figma prototypes. We agree on MVP scope, pricing and launch date. Typically 2–3 weeks.
02
Days 5 – 10
Two-week sprints. Demos every Friday. CI/CD from day one. Store policy engineered in throughout. Typically 6-9 weeks to MVP.
03
Day 11 onwards
App Store + Play Store submission. Crash analytics, monitoring, runbooks. extended paired-engineering handover to your team.
Why Transputec
Not the cheapest mobile agency. Not the largest. But the one that consistently ships on the date we agreed, gets through store review first time, and hands the codebase to your team in a state they can own.
01
No offshored junior teams. Every engagement led by a senior iOS / Android / cross-platform engineer with 5+ years' shipping experience.
02
The MVP scope, price and date are agreed in week one and held. New features become V2 backlog, not V1 budget overrun.
03
Apple App Store and Google Play policy reviewed sprint 1, retested every sprint. Median time-to-store-approval under 5 working days.
04
Paired engineering with your team after go-live. You inherit code you can read, tooling you can run, and runbooks you can act on.
Trusted by UK product teams
Hospitality, bespoke mobile ordering app
Public sector, mobile housing repairs system
Conservation, mobile device management at scale
Software Development Services
Mobile app development sits inside our wider Software Development pillar. Most clients combine mobile work with software testing, legacy modernisation, and a UX design programme to keep digital products competitive.
← Back to Software Development ServicesMobile App Development FAQs
Discovery + Figma prototypes take 2-3 weeks. Build to MVP typically takes 6-9 weeks. Store submission and go-live add 1-2 weeks. Most UK Mobile App Development engagements land between 8 and 12 weeks from kickoff to users’ hands. Larger platforms (multi-tenant, deep integrations) run 14-20 weeks. We fix the scope, the quote and the date in week one. For wider product context, read our blog on AI consulting services for low-code and no-code success. Our practice aligns with the UK Government Service Manual.
Native (Swift / SwiftUI for iOS, Kotlin / Jetpack Compose for Android) wins when performance, deep hardware access (camera, ARKit / ARCore, BLE, sensors) or platform-feel matter. Cross-platform (Flutter or React Native) wins when speed to market across both stores matters more than millisecond performance or platform-specific UX. We recommend one or the other in discovery, with cost and trade-offs documented, then build accordingly. See a bespoke native client example in our bespoke mobile ordering app case study for T&S Enterprise.
UK Mobile App Development pricing is typically fixed-quote on the MVP, with bands by feature count and integration depth. Single-platform MVP (8-12 weeks, native or cross-platform, 3-5 core flows, 2-3 integrations) starts around £48K. Dual-platform MVP (native iOS + Android, 8 core flows, 5+ integrations, payments, push, deep links): £75K-140K. Enterprise platforms with white-label or multi-tenant: bespoke quote. Fixed price, fixed date, no day-rate top-ups. For the wider cost framing on app cost, read our blog on exploring the potential of generative AI in e-commerce.
Yes. App Store Connect + Google Play Console submission is included. We engineer Apple guideline 4.x (UX), 5.x (legal), 2.5 (performance) and Google Play 4.x (privacy), 8.x (monetisation) policies into the build from sprint 1, not patched at submission. Median time-to-store-approval is under 5 working days. We hold an active Apple Developer Program + Google Play Console publisher account if you do not have one yet. See a real public-sector mobile rollout in our mobile housing repairs system for Harlow District Council.
Yes. The launch package includes a extended co-managed handover, paired engineering with your team, monitoring dashboards (Crashlytics, Sentry, Firebase), runbooks for the top-20 incidents, and weekly review cadence. After 90 days you have three options: take full ownership, retain us on a fixed monthly support package, or move to a co-managed support model with your in-house team. See a real client mobile programme in our mobile device management case study for Woodland Trust, and explore the wider Software Development Services pillar.
For UK mid-market organisations the answer depends on three factors. Native (Swift for iOS, Kotlin for Android) wins when you need deep device integration (camera, biometrics, AR, complex offline), platform-specific UX expectations, or peak performance. Cross-platform (React Native, Flutter) wins when feature parity across iOS and Android matters more than platform-perfect UX, the budget is fixed, and the team is small. We scope the right path against your roadmap, user analytics and skills inventory. See the Apple Human Interface Guidelines and Android Design baselines for native expectations.
Ready to ship your mobile app?
Free 30-minute discovery call. We map your MVP scope, your store readiness, and a fixed quote and date to live. No deck. No sales pitch. Just a UK senior engineer and a whiteboard.