Custom Shopify App Development

Apps that do what Shopify can't out of the box.

Trade programs, ERP and freight integrations, part finders, the tools your team lives in. We build custom Shopify apps on the same APIs our public apps run on, so they ship in sprints and hold up under real order volume.

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Our apps power hundreds of Shopify stores and reach millions of customers every month.

The team that builds your custom app also maintains four public apps on the Shopify App Store. That is the bar: production software, used every day by stores that cannot afford downtime.

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Our public apps

Built for clients

Software their checkout depends on. Four of the custom applications and integrations we run for long-term clients.

Zia Tile

+6 years partnered

A trade program application that lets B2B customers log in to the same store for partner pricing, a box and overage calculator so tile orders arrive complete, sample ordering from the product page, arrival estimates synced with their ERP, and a custom LTL freight carrier integration.

  • Trade program application
  • Box & overage calculator
  • ERP-synced arrival estimates
  • LTL freight integration
  • Sample ordering
Zia Tile

Simms Fishing

+4 years partnered

As Simms's fractional web team: a store locator app connected directly to distributor inventory systems and updating in real time, and the trade program application rebuilt from the ground up.

  • Store locator app
  • Distributor inventory sync
  • Trade program application
  • Shopify Plus
Simms banner 1

A vehicle part finder so customers land on the exact bracket that fits their car, plus a wholesale B2B portal for dealers on the same storefront, with bulk-quantity prompts that guide new dealers into the application flow.

  • Vehicle part finder
  • Wholesale B2B portal
  • Dealer application flow
  • Store locator
Sto n Sho showcase image
Sto N Sho

Cousins Maine Lobster

+6 years partnered

The franchise portal every Cousins location runs through: ordering and compliance systems, training, and franchise events tooling, alongside the DTC stores we build and manage.

  • Franchise portal
  • Ordering & compliance systems
  • Training systems
  • Franchise events tooling
Cousins Maine Lobster

What we build

Three kinds of custom app. One team that has shipped all of them.

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Storefront

Tools your customers
use to buy

Part finders, quantity and overage calculators, sample ordering, store locators, configurators. Anything that turns a complicated purchase into a simple one, built into your theme so it feels native.

Integrations

Shopify talking to
the rest of the business

ERP, 3PL and warehouse systems, freight carriers, distributor inventory, PIM and accounting. Two-way syncs that keep arrival estimates, stock and pricing honest without anyone re-keying data.

Operations

Admin tools your
team lives in

Trade and wholesale applications with approvals, franchise and dealer portals, bundle builders, order routing rules. Embedded in the Shopify admin so there is one place to work.

How a sprint works

Scoped in a week, shipped in sprints. You see working software every Friday, on a development store, before anything touches production.

  1. Discovery

    A call and a written scope: the problem, the data involved, the Shopify APIs it touches, and what done looks like

  2. Design

    Admin and storefront screens wireframed in Polaris and your theme, so there are no surprises at launch

  3. Build

    A Shopify app on the Admin and Storefront APIs, with webhooks and background jobs sized for your order volume

  4. QA

    Tested against your real catalog and orders on a development store

  5. Launch

    Installed, monitored and documented, with your team trained on the admin side

  6. Support

    Ongoing through a fractional team retainer, or a sprint when you need the next feature

Pricing

Custom apps are scoped and billed in sprints. Most integrations ship in one; a full application with its own admin usually takes two or three.

Starter Sprint

$7.5k

Get Started: Starter Sprint
Dedicated team focus1 week
Best suited forA single integration or storefront tool
Engagement styleHighly focused, tight orchestration
Regular progress updates Included
Dedicated project manager Included
If it runs overBilled at a day rate, not another full week

Full Sprint

$14k

Get Started: Full Sprint
Dedicated team focus2 weeks
Best suited forA complete app with an admin
Engagement styleBetter weekly rate than a single week
Regular progress updates Included
Dedicated project manager Included
If it runs overBilled at a day rate, not another full week

Is this right for you?

Built for stores where the workaround has become the bottleneck.

A Fit If

  • An app-store app almost does it, and the gap costs you orders or hours every week
  • You run B2B, trade, dealer or franchise channels on the same store
  • Your inventory, pricing or shipping data lives in an ERP, 3PL or distributor system
  • You're on Shopify or Shopify Plus and doing meaningful volume

Not a Fit If

  • You need a theme tweak, not software
  • An existing app fits and just needs configuring
  • You're pre-revenue and the spec changes weekly
  • You want it built off-platform, outside Shopify's APIs

What our clients say

We literally would not be where we are today if it weren't for Conspire. I cannot recommend them enough - they are attentive, highly professional, excellent communicators, quickly responsive, and beyond helpful with their website strategy and development skills. I vetted other agencies and I am so happy I went with Conspire.

+7 years partnered

Working with Conspire was seamless from consultation through implementation. We knew the vibe we wanted but not how to express it in web terms. Jack and Daniel figured it all out. They brought ideas we didn't know we wanted that strengthened customer trust and elevated our brand. Great people, and great at what they do.

Frequently asked questions

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Do we own the app?

Yes. Custom apps are built as your own Shopify app, installed on your store, with the code and the Partner Dashboard app in your name. We host and maintain it under a retainer, or hand it to your team.

Will it break when Shopify updates?

We build on Shopify's versioned Admin and Storefront APIs and keep the app on a supported version. API deprecations are handled as part of support, before they become a problem.

Can you integrate with our ERP or warehouse?

That is most of what we do: ERPs including NetSuite, 3PLs and warehouse systems, freight carriers, distributor inventory feeds. If it has an API or a file export, we can sync it, two ways where it matters.

How is this different from your public apps?

Our public apps (Wholesale, Wishlist, Draft Order Invoices, Bonde) solve common problems for hundreds of stores. Custom work is for the problem only your business has. Often the answer is a public app plus a small custom piece, and we will tell you when that is the cheaper route.

Our Services

Shopify Growth & Support Teams

Hire your super employee. Our Los Angeles-based team of Shopify specialists brings together design, development, CRO, and strategy under one roof. Reliable support, rapid fixes, and a dedicated partner for minor updates to major overhauls.
Learn More about Shopify Growth & Support Teams

Shopify eCommerce Websites

We design and develop Shopify websites engineered for growth. By focusing on customer trust and intuitive user journeys, we turn visitors into buyers. Our builds ensure your brand doesn’t just blend in, but stands out with a unique, professional shopping experience.
Learn More about Shopify eCommerce Websites

Shopify Migrations

Move to Shopify from WooCommerce, BigCommerce, Magento or Squarespace without losing the SEO you have earned. We map every product, customer, order and URL, rebuild the front end on a modern theme, and launch with redirects, analytics and training in place.
Learn More about Shopify Migrations

Shopify Applications

Powering hundreds of millions of dollars in annual revenue. From complex custom applications to public applications used by hundreds of stores - we've done it all. We know how to build applications that scale.
Learn More about Shopify Applications

Shopify Conversion Rate Optimization

Our CRO process is all about data-driven testing, beautiful design, user psychology and fine-tuning every element between a click and a sale. We identify leaks, run structured experiments and turn browsers into buyers - consistently and effective.
Learn More about Shopify Conversion Rate Optimization
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Ready to grow your business?

To discuss your project please select a convenient date & time for you and we will contact you!