Happy Birthday Emails by UW vs Optimal A/B Testingfor Shopify (2026)
Happy Birthday Emails by UW and Optimal A/B Testing are both 5-star rated Shopify apps, but cater to vastly different needs within the e-commerce ecosystem. Happy Birthday Emails focuses on customer retention and loyalty through personalized birthday greetings and discounts, targeting merchants seeking to build stronger customer relationships and increase repeat purchases. It simplifies birthday data collection and email automation, acting as a lightweight CRM. Its strength lies in its ease of use for implementing a birthday loyalty program. Optimal A/B Testing, on the other hand, is geared toward optimizing product listings for increased sales and profitability. It empowers merchants to test different pricing, visuals, and text variations to identify winning combinations that maximize conversion rates. This app is ideal for data-driven merchants who want to leverage A/B testing to improve their product listing performance.
At a Glance
Happy Birthday Emails by UW
141 reviews
Optimal A/B Testing
6 reviews
Detailed Overview
Happy Birthday Emails by UW
Send a birthday email with a discount to build loyalty and repeat purchases
Key Features
- Send birthday emails with personalised messages and discounts
- Run a birthday loyalty campaign with zero ongoing effort
- Collect birthdays and age data at checkout, POS, or landing pages
- Works with your email platform or sends happy birthday emails for you
- Populates Shopify’s customer birthday metafield
Optimal A/B Testing
Optimize all aspects of your product listings to realize your store’s true earning potential
Key Features
- Optimize Sales & Profitability: A/B test pricing strategies, media, and copy
- User-Friendly: No coding, quick setup, and helpful resources
- Automation: End of test determination, alerts, and winner selection
- Real Time Analytics: Gain data insights to further capitalize on site traffic
Feature Comparison
| Rating | 5/5 | 5/5 |
Rating Happy Birthday Emails by UW5/5 Optimal A/B Testing5/5 | ||
| Reviews | 141 | 6 |
Reviews Happy Birthday Emails by UW141 Optimal A/B Testing6 | ||
| Focus | Customer Loyalty & Retention | Product Listing Optimization |
Focus Happy Birthday Emails by UWCustomer Loyalty & Retention Optimal A/B TestingProduct Listing Optimization | ||
| Primary Function | Automated Birthday Emails | A/B Testing of Product Listings |
Primary Function Happy Birthday Emails by UWAutomated Birthday Emails Optimal A/B TestingA/B Testing of Product Listings | ||
| Data Collection | Birthdays & Age | Product Listing Performance Data |
Data Collection Happy Birthday Emails by UWBirthdays & Age Optimal A/B TestingProduct Listing Performance Data | ||
| Target Merchant | Merchants seeking repeat purchases & customer engagement | Merchants optimizing for increased conversions & revenue |
Target Merchant Happy Birthday Emails by UWMerchants seeking repeat purchases & customer engagement Optimal A/B TestingMerchants optimizing for increased conversions & revenue | ||
| Ease of Use (Inferred) | High - Automated & integrates with existing platforms | Moderate - Requires understanding of A/B testing principles |
Ease of Use (Inferred) Happy Birthday Emails by UWHigh - Automated & integrates with existing platforms Optimal A/B TestingModerate - Requires understanding of A/B testing principles | ||
| Value Proposition | Increased customer loyalty and repeat sales through personalized birthday experiences. | Increased sales and profitability through optimized product listings. |
Value Proposition Happy Birthday Emails by UWIncreased customer loyalty and repeat sales through personalized birthday experiences. Optimal A/B TestingIncreased sales and profitability through optimized product listings. | ||
Our Verdict
For merchants prioritizing customer retention and loyalty programs with minimal effort, Happy Birthday Emails by UW is the clear winner. Its automated birthday email system and data collection features are designed to foster stronger customer relationships. However, merchants focused on maximizing sales and profitability through data-driven product listing optimization should opt for Optimal A/B Testing. This app provides the tools and analytics needed to identify and implement high-converting product listing variations. A newer store with limited traffic may struggle to get meaningful results from A/B testing and may be better served by focusing on building their customer base using Happy Birthday Emails. Established stores with sufficient traffic can see potentially significant gains by using Optimal A/B Testing.
Common Questions
Can both apps be used together?
Yes, but they address separate aspects of the business. Happy Birthday Emails builds customer loyalty, while Optimal A/B Testing optimizes product listings. There is no direct conflict, and potentially synergistic benefits.
Is one app easier to set up and use?
Happy Birthday Emails likely has a simpler setup process, as it primarily involves connecting to an email platform and defining email templates. Optimal A/B Testing requires more strategic planning to define meaningful A/B test scenarios.
Which app provides more analytical data?
Optimal A/B Testing is explicitly designed to provide real-time analytics on product listing performance. Happy Birthday Emails primarily collects birthday data, which, while useful for segmentation, is not as extensive.
Which app has a larger community and support base?
Based on the review count, Happy Birthday Emails by UW has a significantly larger user base, suggesting a potentially more active community and a longer track record.
Which app will have a quicker impact on revenue?
Optimal A/B Testing, if implemented correctly, can potentially lead to faster increases in revenue by directly improving conversion rates. Happy Birthday Emails is more of a long-term investment in customer loyalty.
Get More From Your Shopify Store
Run audits for SEO, CRO, PageSpeed, and AI visibility. Get a clear report and actionable fixes.
Try Fix My Store