Mobile Apps People Keep Using.
iOS and Android applications built natively or cross-platform for customers, field teams and internal operations.
From idea to App Store, done properly
A great app earns a permanent place on your customer’s home screen. A poor one gets deleted after one use. The difference is clear purpose, intuitive design and rock-solid performance.
We design and develop mobile apps with React Native and Flutter, delivering native-quality experiences on iOS and Android from a single codebase. From customer loyalty apps to field-service tools, we handle UX, development, backend, App Store submission and ongoing updates.
- codebase for iOS and Android
- 1
- weeks for a typical MVP
- 12–16
- device testing before every release
- Real
Ideal for
- Businesses offering bookings, orders or loyalty to customers
- Field teams replacing paper job sheets
- Start-ups validating a new product idea
- Companies with a web platform that needs a mobile companion
What Our Mobile App Development Service Covers
Specialist expertise delivered by one accountable team, with clear reporting at every stage.
Cross-platform development
React Native and Flutter apps that feel native on both iOS and Android.
UX & UI design
Intuitive, on-brand interfaces tested with real users before development.
Backend & APIs
Secure cloud backends, authentication and APIs that scale with your user base.
Field-service apps
Job lists, offline mode, photos, signatures and GPS for teams on the move.
Push notifications & payments
Engagement features, in-app purchases and secure payment integrations.
App Store launch
Store listings, screenshots, submission and review handled end to end.
How We Deliver
A clear, collaborative process with no surprises, from kick-off to measurable results.
- 01
Define
We clarify the problem, users and must-have features for a focused first release.
- 02
Prototype
Interactive prototypes let you and your users test the experience early.
- 03
Develop
App and backend built in sprints with test builds you can install on your phone.
- 04
Launch & iterate
Store submission, launch monitoring and regular updates driven by user data.
See It in Action
Field-Service Dispatch Platform
Local SEO, 24/7 call answering and a job dispatch app that took a trades business from missed calls to a full diary.
Patient Intake & Triage Engine
A custom online booking and intake portal paired with a 24/7 patient contact desk handling over 15,000 enquiries every month.
Common Questions
Everything you need to know about our mobile app development service.
Still have questions? Call 07878 756103 or email info@signature24hrs.com.
Native or cross-platform: which is better?
For most business apps, cross-platform (React Native or Flutter) delivers native-quality results at lower cost and faster timelines. We recommend fully native only when an app needs specialised device features.
How much does an app cost?
A focused MVP typically starts from £15,000, with more complex apps priced after discovery. We help you prioritise features to launch sooner and within budget.
Do you handle App Store approval?
Yes. We prepare listings, privacy details and builds, and manage submission and any reviewer feedback.
Can you maintain an app another agency built?
Often, yes. We start with a code audit to assess quality and recommend the best path forward.
Related Services
Custom Software Development
Bespoke web applications, portals and internal tools designed around the way your business actually works.
Plugin & API Integrations
Custom plugins, connectors and automations that make your CRM, website, payments and tools talk to each other.
Graphic & Brand Design
Logos, brand identities, marketing assets and presentation systems that make your business look established.
Ready to Get Started?
Tell us about your goals and we’ll put together a clear, no-obligation mobile app development plan with transparent pricing.
Get Your Free Consultation
Speak directly with our London team. We provide scope reviews, technical assessments and transparent cost estimates, with no obligation.
Support Operations
Contact centre and support services run 24/7, 365 days a year.
Signature Marketing & Tech Ltd is registered in England & Wales under Company No. 17439568.