Custom App Decision Guide: Field Kit

App stacking starts as convenience and becomes a cost that grows with you. This guide sorts your apps, tests the build case, and outlines what the one app would do.

01Audit the stack

List every installed app with its monthly fee and the job it doesSmall fees hide in a long list, and the total only appears when you add it up.
Note which apps load scripts on your storefrontEach storefront script slows the store, a cost that never shows on an invoice.
Mark apps that overlap or only fit about eighty percent of your needA poor fit forces workarounds your team repeats every day, which is its own ongoing cost.
Flag apps that hold data or run workflows central to your operationCore data in someone else's system is lock-in you only feel when you try to leave.
Group apps that together approximate one workflowSeveral apps stitched into one process are the strongest candidates for a single replacement.

02Decide

Keep apps that do a complex job well, cost little, and are not coreRebuilding a cheap, well-fitting mainstream tool spends money without improving anything.
Mark for replacement the apps that are expensive, critical, or a poor fitThese are where fees, fragility and lock-in are highest, so replacing them pays back most.
Confirm each replaced job is doable through the Admin API and webhooksA plan that depends on data the API cannot reach fails after the build has started.
Weigh the one-time build cost against the fees and fit you removeWithout that comparison, the decision rests on instinct rather than on your actual numbers.

03Shape the build

Scaffold a Remix app with the Shopify CLI and embed it with App BridgeOff the recommended stack, you maintain plumbing that Shopify already provides.
Install it as a custom app on your own store, not the App StoreA public listing adds review, billing and multi-merchant work your store does not need.
Read and write store data with authenticated Admin GraphQL callsUnauthenticated or ad hoc access leaves the app fragile and exposes store data.
Subscribe to webhooks, verify them, acknowledge fast, and handle idempotentlyUnverified or duplicated events corrupt syncs, and polling misses changes between checks.
Design one admin screen that replaces the scattered app screensIf the team still jumps between tools, the workflow problem the stack created remains.

How to use this

Fill the audit with real invoices, then sort. A good result: a short list of apps to keep, a named set to replace, and a one-page scope for the single app that does their jobs the way your team works.

The rest of the kit is one step away.

Leave your email and the full kit opens right here, ready to work through or save as a PDF.

Kept private. Never shared or sold.