AG Appgroup
AG Appgroup

Bespoke app developer in South-West UK

Ship faster with a senior, on-demand team

Design and build remarkable apps customers love

We’re a small, senior team crafting iOS, Android, and web apps—from zero to launch. Strategy, design, development, and growth in one place.

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Trusted by startups and product teams worldwide

Preview
App dashboard
Mobile app
Code UI
iOS & Android TypeScript • Swift • Kotlin Backend & Cloud

Services

From idea to launch, and beyond. Flexible engagement to match your stage.

Get estimates

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/Kotlin and cross-platform with high-performance UI.

  • CI/CD and TestFlight/Play rollout
  • Crash-free, performant experiences

Web Apps

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

Selected Work

A few recent launches and long-term partners.

Gumtree marketplace
E-commerce Mobile

Gumtree

A second-hand sales platform connecting buyers and sellers across the UK with real-time messaging and location-based search.

Mode cryptocurrency platform
FinTech Trading

Mode

A cryptocurrency financial platform offering seamless trading and investment solutions with real-time crypto trading and portfolio management.

uMotif clinical trials platform
Healthcare Clinical

uMotif

A medical clinical trials platform streamlining patient data collection and management with compliance monitoring.

Bloomlife pregnancy monitoring app
Healthcare Pregnancy

Bloomlife

A pregnancy monitoring app providing real-time insights and health tracking with contraction tracking and doctor communication.

Nationwide banking app
Banking Finance

Nationwide

A comprehensive banking app offering secure financial management solutions with account management and secure transactions.

Sensium patient monitoring system
Healthcare Monitoring

Sensium

A hospital patient monitoring system providing real-time health data analysis with vital signs monitoring and alert systems.

40+
Projects shipped
4.9/5
Average client rating
2–12 wks
Typical delivery window

How we work

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 envs.

  4. Launch & Grow

    Store approvals, analytics, and growth experiments that stick.

What clients say

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.

Client avatar
Aaron Robertson
uMotif Lead Developer

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.

Client avatar
Oliver Boorman Humphrey
Software Design Engineer, Sensium

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.

Client avatar
Mathew Nicholas
Design Director, AI Innovator

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