Function Lab vs Singleton | Verify Customersfor Shopify (2026)
Function Lab and Singleton | Verify Customers are both Shopify apps focusing on pricing-related functionality, although they address completely different needs. Function Lab aims to replace discount scripts with customizable functions via a JSON editor, targeting technically proficient merchants comfortable with DIY development. It provides control over automatic discounts and promises future support for delivery and payment customizations. The strength of Function Lab lies in its flexibility and control, appealing to developers or merchants with in-house technical expertise. Singleton | Verify Customers, on the other hand, focuses on customer validation and access control. It allows merchants to verify registered customers and restrict access to pricing and 'add to cart' buttons based on approval status. This app targets merchants needing stricter customer management, such as those selling wholesale or exclusive products. Its ease of use and pre-built features for registration form customization make it accessible to a broader range of merchants, even those without advanced technical skills. The key difference lies in the target use case: Function Lab for discount customization, and Singleton for customer access control.
At a Glance
Function Lab
1 reviews
Singleton | Verify Customers
78 reviews
Detailed Overview
Function Lab
Replace discount scripts with functions. Create automatic discount functions using our JSON editor.
Key Features
- Take full control of your function with our DIY function editor
- Copy/paste common functions from our sample library
- Available to all Shopify plans
Singleton | Verify Customers
Verify all registered customers and allow or disallow them to see prices and "add to cart" buttons
Key Features
- Approve/decline selected customers one by one, or based on customers tags
- Create your own responsive registration form, with custom fields
- Hide prices and "add to cart" buttons for not approved customers
- Hide store content for not approved customers and redirect them to login page
- Send email to store admin automatically, after new customer is registered
Feature Comparison
| Rating | 5/5 | 5/5 |
Rating Function Lab5/5 Singleton | Verify Customers5/5 | ||
| Reviews | 1 | 78 |
Reviews Function Lab1 Singleton | Verify Customers78 | ||
| Target Merchant | Technically Proficient, Developers | Merchants needing customer validation |
Target Merchant Function LabTechnically Proficient, Developers Singleton | Verify CustomersMerchants needing customer validation | ||
| Primary Function | Custom Discount Functions | Customer Verification & Access Control |
Primary Function Function LabCustom Discount Functions Singleton | Verify CustomersCustomer Verification & Access Control | ||
| Ease of Use | Requires technical knowledge (JSON editor) | User-friendly, built-in features |
Ease of Use Function LabRequires technical knowledge (JSON editor) Singleton | Verify CustomersUser-friendly, built-in features | ||
| Value Proposition | Complete control over discount logic | Enhanced customer management and exclusivity |
Value Proposition Function LabComplete control over discount logic Singleton | Verify CustomersEnhanced customer management and exclusivity | ||
| Pricing Category Focus | Discounts | Customer Access to Pricing |
Pricing Category Focus Function LabDiscounts Singleton | Verify CustomersCustomer Access to Pricing | ||
| Customization | High (DIY JSON editor) | Moderate (Customizable registration form) |
Customization Function LabHigh (DIY JSON editor) Singleton | Verify CustomersModerate (Customizable registration form) | ||
Our Verdict
For merchants seeking granular control over discount logic and possess the technical expertise to manage JSON-based functions, Function Lab is the clear choice. Its 'DIY function editor' caters to developers or those with in-house development teams. The lack of reviews and newness of the app should also be considered, implying potentially more bugs or less established community support.
However, for merchants prioritizing customer validation and controlled access to pricing and products, Singleton | Verify Customers is the superior option. Its user-friendly interface, pre-built features for registration customization, and significantly higher review count make it a more reliable and accessible solution for customer management.
Common Questions
What level of technical skill is required to use each app?
Function Lab requires a good understanding of JSON and potentially Shopify Functions. Singleton | Verify Customers is designed to be more user-friendly and doesn't demand coding skills.
Can Function Lab control which customers see specific prices?
Not directly. Function Lab focuses on discounts, not customer-specific price visibility. Singleton | Verify Customers is designed for this specific purpose.
Does Function Lab offer pre-built discount functions?
Yes, Function Lab has a sample library from which you can copy and paste common functions. This helps reduce the coding needed.
How do the apps differ in their approach to pricing?
Function Lab focuses on dynamically modifying prices via discounts, while Singleton | Verify Customers controls which customers are even *allowed* to see prices in the first place.
Which app is likely easier to set up and configure for a non-technical merchant?
Singleton | Verify Customers is the significantly easier app to setup and configure for non-technical merchants due to its prebuilt features and user-friendly interface
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