Shopify apps thatpass review and get installed.
We have shipped four apps to the Shopify App Store, including SwipeReel and our COD and Alt Text apps. We build custom apps for single merchants and public apps for founders, on Remix, Polaris and Shopify Functions.
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In short
Byteinfy develops custom and public Shopify apps from $3,000, on Remix, Polaris and Shopify Functions, with four of its own apps live on the Shopify App Store and a review process it has been through repeatedly.
Last updated 5 September 2026 · Written by the Byteinfy team, which builds and operates SwipeReel and myBillPlease.
Who it is for
- Merchants who need a workflow no app on the store covers
- Founders launching a public app on the Shopify App Store
- Agencies that want a build partner for app work
- SaaS companies adding a Shopify integration
What you get
- Remix app on Shopify's current app template, embedded with App Bridge and Polaris
- Webhooks, GDPR endpoints, billing API and session storage done to spec
- Shopify Functions for discounts, checkout validation and delivery customisation
- App Store listing copy, screenshots and the review checklist, completed with you
- Monitoring and a support inbox from day one
How it works
- 1
Scope
We map the merchant flow, the data model and Shopify's constraints before quoting. This is where most app budgets are saved.
- 2
Build
Typed, tested, demoed on a development store every week. You install the app yourself and try it.
- 3
Review
We submit, answer Shopify's reviewers and iterate until it is listed. We know what they check.
- 4
Grow
Optional retainer for features, reviews and support after launch.
Pricing
From $3,000
A custom app for one store starts at $3,000. A public App Store listing with billing, onboarding and review readiness typically runs $8,000 to $25,000.
Questions we get asked
- How long does Shopify app review take?
- Shopify's stated target is around two weeks; in 2026 it has often run longer. A clean first submission matters more than anything else, and that is what we optimise for.
- Custom app or public app?
- Custom if one store needs it and you control the data. Public if you want distribution and recurring revenue, with billing, onboarding and support to match. We help you choose on the call.
- Which stack do you use?
- Remix on Shopify's app template, Polaris for the admin UI, Prisma or Mongo for storage, Shopify Functions where logic belongs in checkout.
Further reading
From the Byteinfy blog, where we write up what we learn doing this work.
Often paired with
AI Agents & Automation
Agents that answer customers, look up orders and keep your catalogue clean, wired to your store data.
See what is includedFrom $2,000Shopify Store Development
New stores, custom sections, checkout extensions and headless builds that pass Shopify's performance bar.
See what is includedFrom $500 / monthMaintenance & Support
A monthly retainer: updates, monitoring, fixes and a bank of development hours.
See what is includedNeed Shopify App Development?Let us scope it this week.
A scoped plan, a timeline and a fixed quote, usually within 48 hours of the first call.