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Clean Core Custom SAP App Development

We start with the people who'll actually use it, then choose the technology, SAP Build for rapid low-code development, or SAP Build Code with SAPUI5 and CAP for flexible, enterprise-grade development, whichever your problem actually needs. That's what makes us part of your team, not a vendor working through a brief. It's also why what we build actually gets used, not just delivered.

Talk to us about what's holding you back

As Trusted by

Stoke on Trent Logo
Flora Logo
BBC Logo - White
Sysco Logo - Standard
Brakes Logo - Standard
Princes Logo - Standard
NATS Logo - Standard
Carlsberg Logo
Autoglass logo
Watches of Switzerland Logo

The way we work

People before process

Every build starts with the people who'll actually use it, not a requirements document. Discovery workshops, hosted at our AppHaus space or virtually, use the SAP AppHaus Methodology, human-centred design and design thinking, to understand the real problem before any technology gets chosen.

The right tool for the job

SAP Build gets you a working solution fast, low-code, ideal when speed matters and the requirement is well understood. SAP Build Code gives you the flexibility of SAPUI5 and CAP for complex, highly customised experiences, when greater control is required. We choose based on your problem.

Development

Prototyping and design first, so what gets built is functional and something your team actually wants to use.

Testing

Full support through user acceptance testing, hands-on, not just handed over. We're available to adjust, answer questions, and make sure the solution meets what was actually agreed, with a smooth transition from testing to go-live.

Our Existing Work

Looking for something that already exists?

Not every problem needs a bespoke build. If you're after something ready to deploy, our existing suite of BTP apps might already solve it.

Here's a flavour of the custom apps we have produced before, but we create any custom app your business need.

Engineering

🔵 Notification processing
🔵 Works Order processing
🔵 Physical Inventory
🔵Other, including offline processing

Master Data

🔵 Maextro - Master Data Management & Governance Tool
🔵 Data Approvals
🔵 Mass Processing
🔵 Data Health
🔵 Self-Service

Purchasing

🔵 Purchase Requisitions
🔵 Purchase Orders
🔵 Purchase Order Release
🔵Punch Out Catalogue

Warehouse Management

🔵 Internal
🔵 Inbound
🔵 Outbound
🔵 Monitoring

Human Resources

🔵 For Managers
🔵 For Employees

New Applications

🔵 Support
🔵 Visitor Management
🔵 Other - reach out to us with your unique requirements.

Common Use Cases

Built for a specific problem

Every build starts with a real problem. Here's what that's looked like in practice.

Product Purchase App

Designed for Autoglass depots searching, identifying, and purchasing products without needing an SAP specialist on hand.

Impact: A streamlined, brand-aligned sales process and the first step in Autoglass's clean core journey.

Full case study

Mobile Timesheet App

Designed for NATS employees recording time on the move, without losing the layout they already knew.

Impact: "Significantly improved users' engagement and satisfaction with time recording." (Emma Chambers, NATS)

Full case study

Goods Receipt App

Designed for replacing Watches of Switzerland's legacy, server-based goods receipt process with a BTP-native app.

Impact: Faster, more reliable performance, a closed security vulnerability, and full legacy server retirement.

Full case study

Engineering & Warehouse App Suite

Designed for Princes Foods, replacing an end-of-life legacy system across warehousing, purchasing, and engineering, from malfunction notifications to master data governance.

Impact: 18 applications deployed and counting, paper processing removed from engineering, legacy systems retired, IT complexity reduced.

Full case study

The Bill Comes Later, With Interest

The cost of building outside clean core

Every custom modification made directly to your SAP core, rather than through BTP's extension layer, is technical debt. It surfaces the day you upgrade to the next version of S/4HANA, when every modification has to be found, tested, and either rebuilt or unwound first.

The effect is a compounding cost: The longer a business builds outside clean core, the more expensive and riskier the next upgrade gets. Building on BTP from the start is what keeps that cost from accumulating.

Talk to us about building clean

Our Standards

What to Expect from our custom apps

Delivering real impact, as standard.

Mobile Friendly

Designed with Fiori and responsive principles where they add value. A working experience on the go.

Offline capability

Access and update critical data without a connection, syncing once you're back online. Built for teams in the field.

Exceptional User Experience

Intuitive, easy to navigate, quick to adopt.

End-to-end Support

From development to deployment and beyond. We're with you through the whole thing.

Agility Built-in

Purpose-built for flexibility and scalability, holding up as your business changes.

The latest BTP technology

Built on current SAP BTP capability. Future-ready from launch.

Our clients say it best

Discover how they’ve trusted us to deliver custom SAP apps that streamline processes and accelerate their business.

Rowan Parr – Solution Lead, Sysco

"The implementation has gone so well, Sysco GB now sees France as the new standard for warehouse efficiency. Normally, people resist change—but Bluestonex created...

Chris Winfrey- Network Delivery Director, Brakes UK

"We have now got Maextro live in all of our 20 depots. It is delivering everything we expected it to deliver and probably overdelivered in some...

Barry Croghan – IT Infrastructure Manager, Autoglass Ireland

"The BTP App is the equivalent of 3 full-time employees.”

Glenn Bamford – Head of Business Systems, Watches of Switzerland

“They (Bluestonex) act as an extension of our team, bringing innovation and expertise that we lack internally. With their support, we’ve been able to...

Barry Croghan – IT Infrastructure Manager, Autoglass Ireland

"The BTP App is the equivalent of 3 full-time employees.”

Rowan Parr – Solution Lead, Sysco

"The implementation has gone so well, Sysco GB now sees France as the new standard for warehouse efficiency. Normally, people resist change—but Bluestonex created a solution teams genuinely want."

Glenn Bamford – Head of Business Systems, Watches of Switzerland

“They (Bluestonex) act as an extension of our team, bringing innovation and expertise that we lack internally. With their support, we’ve been able to make strategic moves towards modernising our systems (migrating applications) while remaining agile for the future.”

Chris Winfrey- Network Delivery Director, Brakes UK

"We have now got Maextro live in all of our 20 depots. It is delivering everything we expected it to deliver and probably overdelivered in some areas. Very, very happy and it's done exactly what it says on the tin."

Custom app queries

Frequently Asked Questions

  • It depends on scope, a low-code SAP Build solution and a pro-code application built with SAP Build Code, SAPUI5, and CAP are genuinely different investments. A discovery session scopes it properly before either of us commits to a number.

  • We work as part of your team, not against a fixed spec, so changes get absorbed into the project instead of triggering a change request and a delay.

  • Building on BTP's extension layer, rather than modifying your core, protects you here. Platform updates don't force a rebuild of something that never touched the core in the first place.

  • A SAP Build app can be live in weeks. A custom application built with SAP Build Code, using SAPUI5 and CAP, is scoped based on complexity, but starts with a clear timeline agreed in the discovery session, not an open-ended estimate.

Ready to build your perfect solution?

Here's how to get started:

Step 1

Book a Call

Schedule a call to see how our services can meet your unique business needs.

Step 2

Co-Innovate with our Experts

Join design sessions and workshops with our app development specialists to shape the right solution.

Step 3

Deploy

Integrate your solution into your existing systems and start realising the benefits.

Custom App Developmenet

Got an app idea, or a process that needs one?

Tell us what's actually going on