The Ultimate Guide to Custom Shopify Apps vs Public Apps

In the fast-growing Shopify ecosystem, apps are essential for adding functionality, automating processes, and scaling your store. But when you need something extra, you’ll face a key decision: use a Public App from the Shopify App Store or build a Custom App tailored specifically for your business.

Choosing wrong can lead to higher costs, slower performance, limited flexibility, or ongoing subscription fees that eat into profits. In 2026, this decision is more important than ever due to changes in how custom apps are created.

This ultimate guide breaks down the differences, pros & cons, costs, use cases, and a clear decision framework to help you choose the right path for your Shopify store.

What Are Public Apps and Custom Apps?

Public Apps These are apps built for broad use and listed (or unlisted) on the Shopify App Store. Any merchant can install them. They undergo Shopify’s review process and are designed to solve common e-commerce problems like marketing, SEO, shipping, reviews, or payments.

Custom Apps (formerly often called Private Apps) These are built exclusively for your store (or a small group of stores within the same organization). They are not listed publicly and give you full control over features, data access, and integrations.

Important 2026 Update: Starting January 1, 2026, you can no longer create new custom apps directly from the Shopify Admin. All new custom apps must be created through the Shopify Developer Dashboard and then installed on your store. Existing custom apps continue to work normally.

Public Apps vs Custom Apps: Side-by-Side Comparison

Pros and Cons of Each Approach

Public Apps – Pros

• Fast to install and start using
• Regular automatic updates and new features
• Lower upfront cost (many have free plans)
• Built-in support and documentation
• Great for common needs (email marketing, reviews, upsells, etc.)

Public Apps – Cons

• Ongoing subscription fees can add up
• Limited customization
• Potential performance issues from too many apps
• Features may not perfectly match your unique needs
• Dependency on the app vendor’s roadmap

Custom Apps – Pros

• Perfectly tailored to your business logic and operations
• Better performance and less store bloat
• Full control over data and integrations (ERP, CRM, warehouses, etc.)
• Stronger security and compliance options
• Potentially lower long-term cost for complex needs

Custom Apps – Cons

• Higher upfront development cost and time
• You (or your developer) handle updates and maintenance
• Requires technical expertise or hiring a developer
• Creation process changed in 2026 (must use Developer Dashboard)

When to Choose Public Apps

Public apps are the smart choice when:

• You need standard functionality quickly (reviews, loyalty programs, basic SEO, shipping labels, etc.)
• Your store is in early or growth stage with limited budget
• You want zero development hassle and automatic updates
• The feature is not core to your competitive advantage

Examples: Klaviyo for email, Judge.me for reviews, Rebuy for recommendations, or Shopify’s own Search & Discovery.

When to Choose Custom Apps

Go for a custom app when:

• Your business has unique workflows or proprietary processes
• You need deep integrations with internal systems (ERP, custom fulfillment, accounting)
• Performance and speed are critical (avoiding app bloat)
• You have strict data privacy, compliance, or security requirements
• You want full ownership and long-term control
• Public apps force too many workarounds or limitations

Examples: Custom B2B pricing logic, proprietary inventory sync, unique checkout experience, or admin tools tailored to your team.

Hybrid Approach: The Best of Both Worlds (Recommended for Most Stores)

Many successful merchants use a smart mix:

• Public apps for standard features (marketing, analytics, customer support)
• Custom apps for core differentiators (unique fulfillment, pricing engine, internal tools)

This strategy keeps costs down while giving you the flexibility and performance you need as you scale.

How to Get Started in 2026

For Public Apps:

1. Visit the Shopify App Store and search for your need.
2. Read reviews, check performance impact, and test on a development store.
3. Install and configure.

For Custom Apps:

1. Create or access the Shopify Developer Dashboard.
2. Build or hire a developer to create the app using Shopify’s APIs, App Bridge, and Polaris (for embedded experience).
3. Install the custom app on your store.
4. Test thoroughly and monitor performance.

Tip: Always start by auditing your current apps and identifying pain points that no public app fully solves.

Final Thoughts

There is no universal “best” choice — it depends on your store’s stage, budget, technical needs, and long-term vision. Public apps offer speed and convenience for most everyday features, while custom apps deliver unmatched flexibility, performance, and control for what truly makes your business unique.

In 2026, the smartest merchants combine both: leveraging reliable public apps for standard tasks and investing in custom solutions where it creates real competitive advantage.

Before deciding, ask yourself:

• Is this feature core to my business differentiation?
• Will ongoing subscription fees become expensive?
• Do I need deep integrations or custom logic?

Answer these honestly, and you’ll make the right choice for sustainable growth.

Have you used custom apps or stuck with public ones? What has been your experience with performance, cost, or customization? Share your thoughts in the comments below!