Technical Discovery & Product Scoping
We map out your application’s core use cases, user roles, tech stack requirements, and feature priorities before a single line of code is written, ensuring an efficient roadmap aligned with your business goals.
Develop Operating Service
Software & Application Development
We engineer high-performance mobile, web, and custom software applications designed to scale your business. Blending technical precision with seamless UX, we deliver the robust digital infrastructure you need to streamline workflows and drive user engagement.
Custom Engineered for Scale
Seamless Multi-Platform UX
Streamlined Workflows, Zero Friction
Robust Infrastructure for Growth
Timeline
8-16 weeks depending on complexity
Category
Develop
Delivery
Strategy + execution
Service Control Room
Software & Application Development
Active
App Metrics
Day-30 Retention68%
Crash-Free Rate99.7%
App Store Rating4.9 ★
Active Users
24,800
+12% this sprint
Sprint Velocity
42 pts/wk
Reviews
4.9 / 5
Focus
App store ratings, user retention, and session engagement metrics.
Next step
Scope the right plan in a discovery session.
Service Overview
A clearer way to approach software & application development.
We connect strategy, execution, and optimisation around a practical plan your team can understand, trust, and measure.
Timeline
8-16 weeks depending on complexity
Primary Focus
App store ratings, user retention, and session engagement metrics.
Software & Application Development is a strategic engineering service designed to build, scale, and optimise your business’s digital capabilities. It encompasses the end-to-end creation of custom web applications, mobile apps, and bespoke software systems, ensuring your technology acts as a direct driver of operational efficiency and commercial growth.
Modern business requires robust, tailor-made technology. Off-the-shelf solutions often fail to align with unique workflows, leaving scaling organisations to grapple with fragmented systems, disconnected user experiences, and limited data visibility. When digital platforms are rigid or poorly integrated, they create operational bottlenecks that stifle innovation and slow down execution.
Through our software and application engineering frameworks, Sellable Marketing designs and deploys high-performance digital products. Our capabilities span cross-platform mobile development (iOS and Android), browser-based web applications, and custom backend systems. We focus on clean architecture, secure API integrations, seamless UX/UI design, and scalable databases to deliver tools that integrate flawlessly into your business model.
Building custom software internally demands massive capital, specialised technical talent, and protracted timelines. Our specialised development squads act as your dedicated engineering partners, handling everything from technical discovery and system architecture to deployment and optimisation, ensuring your project is delivered with speed, precision, and commercial viability.
By investing in tailored software engineering, businesses can automate manual processes, unlock new revenue channels through mobile and web touchpoints, gain a distinct competitive edge, and secure a future-proof technical foundation built to support long-term enterprise growth.
App architecture document
UI/UX design system
Native or cross-platform build
Benefits & Features
Built around the details that create trust, clarity, and conversion.
User Experience & Interface Design
Every screen is architected around friction-free usability, task completion, accessibility, and high-fidelity visual design, striking the perfect balance between beautiful aesthetics and intuitive user journeys.
Cross-Platform & Native Development
We develop high-performance applications tailored to your platform strategy, whether building native iOS and Android apps, cross-platform hybrid solutions, or responsive browser-based web applications.
Custom API & Backend Engineering
We build robust backend logic and secure APIs that connect your application seamlessly with internal databases, client dashboards, payment gateways, CRMs, and automated third-party workflows.
Rigorous Quality Assurance & Testing
Our structured QA process subjects your software to exhaustive automated and manual testing, covering core user flows, edge cases, device compatibility, security vulnerabilities, and peak-traffic performance.
Deployment & Launch Management
We handle the technical complexities of bringing your product to market, managing everything from secure server provisioning and cloud environment setup to Apple App Store and Google Play compliance and approvals.
Performance Optimisation & Scale Readiness
We engineer your software with a modular framework and clean code architecture, ensuring fast processing speeds, minimal latency, and the infrastructure needed to handle thousands of concurrent users as your business scales.
Analytics, Tracking & Data Visibility
We integrate advanced event tracking and behavioural analytics directly into your application, giving your team deep visibility into user engagement, system performance, and conversion metrics, enabling data-backed decision-making.
Post-Launch Iteration & Optimisation
Following deployment, we support your product's evolution by analysing real-world user feedback, managing system updates, rapidly patching bugs, and prioritising the next phase of commercial features.
Process
A structured workflow that keeps the work focused and accountable.
01
Scoping & Design
Define features, create user flows, and design the interface.
02
Development
Build with clean architecture, testing, and performance focus.
03
Testing & QA
Rigorous testing across devices, platforms, and edge cases.
04
Launch & Iterate
App Store deployment, user feedback collection, and feature updates.
Results
Expected outcomes
New revenue channel
Improved customer experience
Operational efficiency
Competitive advantage
Scalable digital product
Business Benefits
Why Choose Sellable Marketing
Commercially-Driven Engineering
A Dedicated Tech Partnership, Not a Vendor
Unified Mobile & Web Expertise
Enterprise-Grade Security & Stability
Transparent, Risk-Mitigated Delivery
Seamless Third-Party Ecosystem Integrations.
Performance Focus
App store ratings, user retention, and session engagement metrics.
Proof
Trust the team that has delivered across different industries.
823K+
Leads Generated
£1M
Revenue Influenced
72%
Client Retention
30+
Businesses Achieve Their Goals
Packages
Choose a project package. Add ongoing care or AI ops when you're ready.
Essential
From £4,000
You get a fully functional Minimum Viable Product (MVP) launched to market. It eliminates technical guesswork, proves your business concept with real-world user data, and establishes a secure technical foundation for future investment or scaling.
Technical Discovery & Product Scoping
Core User Workflow (1–2 User Roles)
High-Fidelity UI/UX Design (Up to 8 Core Screens)
Cross-Platform Deployment (Choose Web App, iOS, or Android)
Standard Authentication (Email & Secure Social Login)
1 Foundation Third-Party Integration (e.g., Stripe Payment Setup)
Full Quality Assurance & App Store/Cloud Launch Management
6 – 10 weeks
Best for: Early-stage ventures, founders validating an idea, or businesses looking to digitise a single core operational process quickly without massive upfront capital.
Recommended
Stellar
From £10,000
A comprehensive, multi-platform ecosystem that drives deep user engagement and completely removes manual operational bottlenecks. Your business gains a proprietary, revenue-generating digital asset that scales seamlessly alongside your customer volume.
Everything in the Essential Tier
Full Multi-Platform Availability (Unified Web + iOS + Android App)
Complete Custom Backend & API Engineering
Multi-Role User Access Controls (Clients, Staff, Admins)
Custom Dashboards & Automated Reporting Real-time Data
Advanced Integrations (CRMs, Internal ERPs, Complex Workflows)
In-App Messaging or Real-Time Push Notifications
Scalable Cloud Infrastructure Configuration (AWS / Azure)
3 – 5 months
Best for: Established businesses automating complex internal operations, companies launching a robust commercial SaaS platform, or brands requiring a fully unified mobile and web presence.
Stellar Plus
From £15,000
A fully bespoke, high-performance software ecosystem built for mass scale and ironclad data protection. It unifies your entire business technology stack, protects brand reputation through advanced security controls, and gives your enterprise a distinct, unreplicable competitive advantage.
Deep System Architecture Mapping & Legacy Data Migration
Unlimited User Roles, Advanced Security Controls & Audit Logging
Fully Bespoke Complex Workflow & Logic Engines
AI-Powered Functionality (Automated workflows, Custom API engines)
High-Availability Redundant Cloud Architecture with Load Testing
Strict Data-Protection and Compliance-Ready Structures (GDPR)
Dedicated Project Management & QA Engineering Squads
Phased Milestone Delivery (6+ months)
Best for: Enterprise organisations executing large-scale digital transformations, high-traffic platforms requiring elite security compliance, or businesses integrating advanced automation and custom logic engines.
Optional Add-ons - Extra Value. Lower Cost. Better Results. Sustainable Growth.
FAQ
Let's address your questions today.
The primary difference lies in how a user accesses them. A web app runs entirely inside a web browser (like Chrome or Safari) and requires no download, making it accessible from any device via a URL (e.g., a customer portal or CRM). A mobile app is built specifically for smartphones and tablets, downloaded via the Apple App Store or Google Play, and installed directly on the device. Mobile apps can access native phone hardware like the camera, GPS, and push notifications seamlessly, and they often provide offline functionality.
The investment for custom development depends heavily on your project’s complexity, feature list, and platform strategy. At Sellable, our tiered pricing models are built to align with different business stages: our Essential validation sprint begins at £4,000; our comprehensive, feature-rich Stellar platform ranges from £10,000 to £15,000; and fully bespoke, high-scale enterprise ecosystems receive tailored custom quotes based on system architecture and integration depth.
A standard software development lifecycle varies by project scope. A streamlined Minimum Viable Product (MVP) or low-code application built to validate an idea typically takes 6 to 10 weeks. A robust, multi-platform business application with complex backend data configurations and custom API integrations generally requires 3 to 5 months. We provide a definitive, transparent timeline milestone roadmap during our initial technical discovery phase before development begins.
Native app development involves writing separate, dedicated codebases for iOS (using Swift) and Android (using Kotlin). This offers maximum performance and deep device feature access but requires double the development effort. Cross-platform (or hybrid) development uses a single shared codebase (using frameworks like Flutter or React Native) to deploy highly responsive apps to both Apple and Android app stores simultaneously. This significantly reduces initial development costs and slashes your long-term maintenance timelines without sacrificing user experience.
Yes. We specialise in building custom API configurations and secure backend logic designed to bridge your new software seamlessly with your existing tech ecosystem. Whether you need your web application to sync real-time data with enterprise CRMs (like HubSpot or Salesforce), legacy databases, secure payment gateways (like Stripe), or internal automation tools, we eliminate manual bottlenecks to ensure data flows flawlessly across your systems.
A digital product requires ongoing optimisation to stay stable, fast, and secure. Following deployment, we provide structured support through our specialised maintenance frameworks to manage real-world user feedback, rapidly patch system bugs, and push software updates. Additionally, we ensure your application stays fully compatible with evolving iOS, Android, and web browser updates, keeping your technical infrastructure reliable and safe from data vulnerabilities.
Ready to move?
Let's shape the right software & application development plan for your business.
Book a free discovery session. We will scope your goals, clarify the right approach, and recommend the next practical step.