We build apps for one business: yours. The process no App Store app covers, the integration your systems are missing, the tool your team works around every day. A standard custom app costs €5,000 at a fixed price – and the code belongs to you.
Is this you?
Most companies that ask us for an app have already installed three that almost fit. A custom app is built around your process instead – and when an existing app would do, we tell you.
B2B pricing by customer group, a loyalty programme with your own rules, a product configurator, a members area – logic that belongs to your business, not to a plug-in.
ERP, merchandise management, PIM, a 3PL or a payment provider without a connector. Orders, stock and prices have to flow both ways – reliably, every time.
Spreadsheets, copy-paste between tabs, manual checks every morning. An internal app puts the job in one screen: returns, production planning, wholesale orders, approvals.
Each one loads scripts into the storefront, charges monthly and has a vendor to chase when something breaks. One app that does your job runs faster and costs less over time.
What we build
One team carries your app from the first conversation to go-live – and keeps it running afterwards if you want.
An app inside your Shopify admin that does exactly your job – built with React, Node.js and TypeScript, in Polaris, so it feels like part of Shopify. The same stack behind the loyalty programme and members area we run for Regenliebe and MADSea.
ERP and merchandise management (plentymarkets, JTL), Klaviyo, payment and shipping providers, PIM and 3PL – with retries, logging and a dashboard that shows what synced and what did not.
Screens for the people who run the business: order and returns handling, stock and production planning, reporting across shops. One tool instead of five tabs and a spreadsheet.
Configurators, members areas, B2B order forms, custom product logic – as theme app extensions your team places in the theme editor, without theme code to maintain.
Event-driven flows on orders, inventory, customers and fulfilments. Idempotent handlers and alerts, so a missed webhook never turns into a missed order.
Hosting on your accounts (EU on request), monitoring and updates to each new Shopify API version. Your app keeps working when Shopify changes.
How it works
A fixed price before we start, working software every week and a go-live date you can plan around.
We talk through the problem, the systems involved and who works with the app. You get a written fixed price – €5,000 for a standard custom app – and a go-live date.
Screens, data model, access rights and integrations – agreed with you before the first line of production code.
Every week a working version on a development store you can click through. Automated tests for everything that touches orders and money.
Installed on a staging store with your real catalogue and processes, tested with the people who will use it.
Installed in your live store, your team onboarded, documentation handed over. The app runs in a Shopify Partner account you control.
Monitoring, API updates and new features on a monthly retainer – or a documented handover if you would rather run the app yourself.
Proof
We do not only build apps for clients – we run them every day: the loyalty programme and members area (brandupmember.com) for Regenliebe and MADSea, store-specific apps for Klean Kanteen Germany, and three apps in the Shopify App Store.
AI visibility for Shopify: checks product data for Shopify Catalog and AI shopping channels, writes SEO texts from store data, and measures whether ChatGPT, Gemini and Perplexity name the store – with a fact check of the answers and the revenue AI assistants bring in.
100 ready-made sections for Online Store 2.0 themes as theme app blocks – customised in a visual builder with live preview, added in one click, no code in the theme. 14 of them are free.
Combined Listings – BrandUp: shows standalone products as a variant switcher on the product page. Product groups, colour swatches, AI grouping and click analytics – on every Shopify plan.
Pricing
Most custom apps fit the standard package. If yours is bigger, you get a written fixed price after the first call – never an open-ended hourly bill.
One custom app for your store or company, from brief to go-live – built around your process.
Several integrations, multiple shops or a larger internal system – scoped and priced before we start.
Maintenance, Shopify API updates, monitoring and new features – for apps we built or apps you inherited.
FAQ
Describe it in three sentences. We come back with a call slot and a fixed price – €5,000 for a standard custom app, no obligation.