SHOPIFY APP DEVELOPMENT

When the App Store Doesn't Have What You Need — We Build It

Private apps, public apps and Shopify Functions built specifically for your store — not a generic plugin that almost fits. Replace $200/month third-party apps with a one-time custom build that's faster, leaner, and fully yours.

Private & public Shopify apps Shopify Functions (Plus) Replace costly third-party apps Fixed-price proposal
Discuss your app

Real Project Result

Private Shopify App
$340
Saved / Month

Real project result

Beauty brand: replaced 4 paid Shopify apps with a single custom private app — PageSpeed improved from 54 to 88.

  • Replaced loyalty, rewards, bundle builder and pre-order apps with one custom-built private app
  • $340/month in recurring app fees eliminated — build cost recovered in under 6 months
  • Removing 4 third-party scripts improved mobile PageSpeed from 54 to 88
4-week build · Verified projectSee all case studies

App Replacement ROI

A custom app pays for itself — and eliminates the annual cost forever.

2 apps at $99/mo each
$198/mo$2,376/yr
3 apps at $79/mo each
$237/mo$2,844/yr
4 apps at $49–149/mo
$340/mo$4,080/yr

A custom build typically costs $1,500–$6,000 depending on complexity. Most clients recover the cost in 6–18 months and pay nothing recurring after that.

What We Build

Apps for every Shopify use case

From simple admin tools to complex storefront apps with billing and App Store listing.

Product drop and waitlist apps
Bundle builder and kit builder apps
Custom size guide and fit recommendation apps
Loyalty and rewards program apps
Subscription and membership apps
B2B wholesale and tiered pricing apps
Custom checkout extensions (Shopify Plus)
ERP and inventory sync apps
Social proof and review apps
Shopify Functions for discount and shipping logic
Private admin apps for internal tools
Storefront API integrations

App Types

From private tools to App Store products

Private Apps

Most common

Built exclusively for your store. Never published. Faster to build, lower cost, no review process. Ideal for replacing paid apps, building internal tools, or adding functionality Shopify's API supports but no app offers cleanly.

Product drop systems
Custom loyalty programs
ERP sync apps
Internal admin tools

Shopify Functions

Shopify Plus

Customise checkout logic at a level no standard app can reach — discounts, shipping, payment options, cart validation. Only available on Shopify Plus. We've built Functions for tiered pricing, stacking discounts, and conditional free shipping.

Custom discount stacking
Tiered B2B pricing
Conditional shipping rules
Cart validation logic

Public Apps

App Store

Apps listed on the Shopify App Store available for any merchant to install. Require Shopify's review and approval. We handle the full submission process — architecture, OAuth, billing, and App Store listing optimisation.

App Store apps
Embedded admin apps
Checkout UI extensions
Theme app extensions

Got a paid app you want to replace? We'll scope it free.

Send us the apps you're currently paying for and we'll tell you which ones can be custom-built, what it costs, and how fast you'll break even.

Get a Free App Audit

Our Guarantees

We stand behind our work — in writing.

🔒

Fixed-Price Before We Start

Every app is scoped and priced before a single line of code is written. No hourly billing, no surprise invoices — you know the full cost upfront.

⚙️

Shopify-Native Architecture

Built using Shopify's official APIs, App Bridge and CLI standards — not hacks. Your app will pass Shopify's review process and survive every API version upgrade.

🛠️

Maintained Post-Launch

We offer ongoing maintenance packages. Shopify releases new API versions twice a year — we keep your app compatible and running at every update.

Why Miracle Websoft

Not a generic agency.
A fashion Shopify specialist.

Fashion-only focus

We work exclusively with clothing brands. We already know your customers, your problems and your conversion challenges.

Performance-first

Every store targets sub-1.5s mobile load times. Speed is the foundation of every decision we make.

Conversion built in

CRO thinking is in every page layout, button placement and checkout flow — not an afterthought.

Zero-risk migrations

Full product catalog, customer data, SEO URLs all preserved. Zero downtime, zero traffic loss — guaranteed.

Direct communication

You work directly with the people building your store. No account managers, no handoffs.

FAQ

Shopify app development — common questions

Ready to grow?

Build a store that
actually converts.

Get a free audit of your current store. We will show you exactly what is losing you money and how to fix it.