Gumtree
A second-hand marketplace connecting buyers and sellers across the UK, with real-time messaging and location-based search.
Bespoke app studio · South-West UK
Design and build
remarkable apps.
We’re a small, senior team building SaaS platforms, native iOS and Android apps, and web apps — from zero to launch. Strategy, design, development and growth in one place.
Products we’ve designed and built
Latest work
Our two newest
products.
One live, one coming soon — product design, web and native engineering, and the cloud infrastructure underneath.
venuepal
Live
Every venue.
One dashboard.
Venue management SaaS for field teams — venues, campaigns, visits and maps, on the web and in native mobile apps.
Read the case study ↓
Coming soon
Supporting inclusion in everyday practice.
An inclusion-support platform for UK schools, with AI decision support that never learns who a pupil is.
Read the case study ↓
venuepalCase study 01
Every venue.
One dashboard.
VenuePal gives field-marketing teams a single place to manage venues, run campaigns, record visits with photo evidence and track performance. We built it in the browser, and as native apps for iOS and Android.
- Product
- B2B SaaS
- Platforms
- Web · iOS · Android
- Status
- Live
- Visit
- venuepal.net ↗
Venues & maps
From spreadsheet
to venue network.
Teams bring their venue lists in bulk; addresses are geocoded and every venue lands on an interactive map, ready to tag, filter and plan campaigns around.
- Bulk import with geocoding
- Tags, statuses & filters
- Live campaign maps
A venue list
Mapped in VenuePal
Keep scrolling
Web & native
Plan at the desk.
Work in the field.
A Next.js web app on Cloudflare for planning and admin, plus native iOS and Android apps built with Compose Multiplatform — local-first, so field teams keep working without signal and sync when they’re back online.
Web
iOS
Android
Launch film · 15s
What we built
Product, platform
and launch.
- Venue catalogue with tags, status sets and search
- Bulk import with address geocoding
- Campaigns, visit templates and photo evidence
- Interactive venue and campaign maps
- Organisations, roles, invites and Stripe billing
- A 15-second motion ad, cut from real product screens
Stack
Next.jsTypeScriptSupabasePostgres RLSCloudflare WorkersStripeGoogle MapsKotlin MultiplatformCompose
Case study 02Coming soonSupporting inclusion
in everyday practice.
Inclusa helps the adults supporting children and young people understand barriers to engagement, make confident decisions and put practical, inclusive strategies into action — co-designed with schools and specialist practitioners.
- Product
- EdTech SaaS
- For
- UK schools
- Status
- In development
- Visit
- inclusa.co.uk ↗
Decision Support Tool
Describe the moment.
Get a next step.
Teachers describe a classroom situation in plain language. Inclusa returns specialist-informed strategies grounded in a curated knowledge base — never diagnoses, never invented advice.
What are you seeing?
Find strategies →Plain language. No names needed.
Strategies to consider
- 1Visual countdown before the transition
- 2Reduced demand start on return
- 3Movement break before re-entry
Privacy architecture
Pupil-blind
by design.
The AI never learns who a situation is about. Only scrubbed situation text leaves the browser for a separately hosted, UK-based decision-support service. Pupil history is joined back in afterwards — in the browser, under the school’s own row-level permissions.
No pupil IDs sent to the AIUK data residencyRow-level securityWCAG 2.2 AA
Product design
See what’s
actually working.
Stack
Next.jsCloudflare WorkersSupabase (EU/UK)Row-level securityFastAPILLM pipelineCurated knowledge base
What we make
SaaS, native
and web.
Dashboards, maps, workflows and mobile apps — product screens from VenuePal and Inclusa.
Selected client work
Apps people
rely on.
Launches and long-term partnerships across e-commerce, fintech, banking and regulated healthcare.
Mode
A cryptocurrency platform offering real-time trading and portfolio management.
uMotif
A clinical-trials platform streamlining patient data collection, with compliance monitoring built in.
Bloomlife
A pregnancy monitoring app with real-time insights, contraction tracking and doctor communication.
Nationwide
A banking app offering secure account management and transactions.
Sensium
A hospital patient-monitoring system with wireless vital-sign tracking and alerts.
40+Projects shipped
4.9/5Average client rating
2–12 wksTypical delivery window
Services
From idea to launch,
and beyond.
Flexible engagement to match your stage — one small, senior team across strategy, design, engineering and infrastructure.
Product Strategy
Research, validation, scoping and roadmapping to de-risk your build.
- Opportunity mapping and MVP definition
- Sprint planning and delivery model
Product Design
UX, UI and motion systems that feel fast, friendly and familiar.
- Design systems and component libraries
- Prototyping and user testing
Mobile Development
Native Swift and Kotlin, and cross-platform, with high-performance UI.
- CI/CD and TestFlight / Play rollout
- Crash-free, performant experiences
Web Apps & SaaS
Full-stack apps with modern tooling, fast APIs and crisp UI.
- SSR, caching, auth, analytics
- Component-driven systems
Backend & DevOps
Scalable APIs, infra-as-code, observability and reliability.
- IaC, Kubernetes, serverless
- Monitoring, alerting, SLOs
AI & Integrations
Intelligent features, automations and integrations that scale.
- LLM features, embeddings, RAG
- Payments, analytics, auth
How we work
Tight loops.
Real velocity.
Tight feedback loops, real velocity, predictable outcomes.
1
Discovery & Scope
Goals, constraints, and a clear first milestone with estimates.
2
Design & Validate
Prototypes and user tests to validate the core moments.
3
Build & Iterate
Weekly demos, telemetry, and rapid iterations in production-like environments.
4
Launch & Grow
Store approvals, analytics, and growth experiments that stick.
What clients say
A true partner,
not a vendor.
We embed as a true partner. Here’s what that feels like.
“Luke at Appgroup worked with us at uMotif for just under a year and made a significant contribution in helping us build a new app from scratch using the very latest technologies. SwiftUI was still in its infancy and not a proven technology in production but Luke quickly became something of a SwiftUI expert. He implemented a large variety of features that were well tested in a complex and regulated environment requiring collaboration between several teams. He stood out as an experienced, friendly, well-liked and highly creative developer. I’d happily recommend Luke.
“I have worked closely with Luke at Appgroup over the past 2 years on the development of an iOS app for the Sensium wireless vital sign monitoring system. Luke quickly understood the benefit such an app would bring the product and used his skills to realise that, in the face of challenging technical constraints. Luke’s standard of work is always of a very high quality so he made the job of testing the product easy. He has good time management skills and always works hard to achieve a deadline. Above all, I have been impressed by Luke’s can-do attitude and his willingness to adapt to the processes required for regulated medical software development.
“Luke has shown that he is an incredibly gifted designer and manager. He has always given good strong advice when confronting complex problems or when designing a game to be fun, as well as many other things. His ideas are compelling and inspirational and he has all the qualities required in a Design Director. It has been a pleasure working with/for Luke.
Let’s build your
next release.
Tell us about your goals and timeline — we’ll reply within 24 hours.
- Fixed-bid and flexible-monthly options
- Start within 1–2 weeks
- Weekly demos and async updates