justmobileapps.co.uk
Portfolio & Case Studies

Shipped, rated,
and still in the stores.

Six case studies from recent UK and global engagements — covering retail, HealthTech, fintech, logistics and EdTech. Full architecture notes, client references and build timelines available on request.

120+
Apps shipped
14
Countries
4.8★
Avg. rating

01 — Selected work

Recent builds. Real results.

Every project below was delivered on time and on budget. Metrics are verified by the client.

The Linen Gallery
Retail Swift · Kotlin

The Linen Gallery

UK Luxury Retailer

A premium iOS and Android shopping experience for a UK heritage linen brand. End-to-end build from UX discovery to App Store submission, with a custom AR room-visualiser feature.

Challenge

The client needed a mobile experience that reflected the premium positioning of their physical stores — not a generic e-commerce template.

Outcome

Launched to 4.9★ on the App Store within the first month. AR visualiser drove a 34% uplift in conversion on featured product lines.

4.9★ App Store 210k+ downloads +34% conversion AR visualiser
16 weeks 1 PM · 2 iOS · 1 Android · 1 QA
LulaBand
HealthTech Flutter · Dart

LulaBand

UK HealthTech Start-up

A HIPAA-compliant health monitoring app paired with a wearable band, built in Flutter for simultaneous iOS and Android launch. Real-time BLE data sync, clinician dashboards and encrypted cloud storage.

Challenge

Bluetooth data reliability across the fragmented Android device landscape, while maintaining strict HIPAA compliance throughout the stack.

Outcome

38,000 daily active users within six months of launch. Zero critical security findings in independent penetration test.

HIPAA compliant 38k daily actives 0 sec findings BLE real-time sync
20 weeks 1 PM · 2 Flutter · 1 Backend · 1 QA
Lunares
E-Commerce React Native · TypeScript

Lunares

EU Fashion E-Commerce

A high-performance React Native shopping app for a fast-growing European fashion brand targeting UK and EU markets. Custom animation system, one-tap checkout and a personalisation engine powered by purchase history.

Challenge

Cold start time of 3.8 seconds on the legacy build was killing conversion. The client needed sub-1.5 second performance without a full rewrite.

Outcome

+41% checkout rate after launch. Cold start reduced to 1.2 seconds. Featured by Apple in the Shopping category.

+41% checkout rate 1.2s cold start Apple featured UK & EU launch
14 weeks 1 PM · 2 RN · 1 Designer · 1 QA
Vault & Co.
FinTech Swift · Kotlin

Vault & Co.

UK FinTech Scale-up

A regulated savings and investment app for UK retail investors. Native iOS and Android build with biometric authentication, Open Banking integration and FCA-compliant disclosure flows.

Challenge

Navigating FCA regulatory requirements while delivering a consumer-grade UX that competed with established neobank incumbents.

Outcome

Approved by the FCA within standard review timeline. 22,000 signups in the first 30 days following a Product Hunt launch.

FCA compliant 22k signups / 30 days Open Banking Biometric auth
24 weeks 1 PM · 2 iOS · 2 Android · 1 QA
ShiftRoute
Logistics Flutter · SQLite

ShiftRoute

UK Logistics Operator

A driver-facing route optimisation and proof-of-delivery app used by 600+ field operatives across the UK. Offline-first architecture with background sync and native camera integration for POD capture.

Challenge

Drivers frequently operated in areas with no mobile signal. The app had to work flawlessly offline for up to 8 hours and sync reliably on reconnection.

Outcome

600+ active drivers. Delivery confirmation time reduced from 4 minutes to under 40 seconds per drop. Zero data loss incidents since launch.

600+ drivers 40s per delivery Offline-first UK nationwide
18 weeks 1 PM · 2 Flutter · 1 Backend · 1 QA
Learnly
EdTech React Native · Expo

Learnly

UK EdTech Start-up

A personalised learning app for secondary school students in the UK, with adaptive quiz engine, progress tracking and parent dashboard. Integrated with national curriculum standards.

Challenge

Keeping teenagers engaged on an educational app long enough for meaningful learning outcomes — without resorting to dark pattern gamification.

Outcome

Average session length of 22 minutes. 78% of students who completed the onboarding flow returned within 48 hours.

22 min avg session 78% D2 retention UK curriculum Parent dashboard
12 weeks 1 PM · 2 RN · 1 Designer · 1 QA

02 — How we document

Full case studies available on the call.

Each project above has an extended write-up covering architecture decisions, challenges, build timeline and client references. We share these under NDA.

01

Architecture notes

Full technical write-up of every major decision — stack choices, trade-offs, third-party integrations and performance benchmarks.

02

Client references

Direct introductions to the founder or product lead on each project listed, available after an NDA is signed.

03

Build timeline breakdown

Sprint-by-sprint delivery log showing what shipped each week, how scope was managed and what changed mid-project.

UK-Backed. India-Built.

Your app could be next in this list.

Share your requirements. We will send a scoped estimate — in writing, in GBP — within 48 hours.

Start Your Project View Our Services