September 09, 2026
Hiya Health wanted to increase customer lifetime value by introducing post-purchase upsell offers within its Shopify store. Since the store already included custom Shopify development, integrating a third-party upsell solution required careful planning to avoid disrupting the existing shopping experience.
SynergyTop successfully integrated and customized the CartHook application, enabling Hiya Health to deliver targeted post-purchase offers while maintaining the store’s performance, functionality, and user experience.
Headquarters: USA
Industry: Health & Wellness / Nutritional Supplements
Service Type: Custom Shopify Development & Third-Party Integration
Geographies Impacted: USA
Project Duration: Ongoing
Key Technology: Shopify, CartHook
Hiya Health is a leading provider of children’s nutritional supplements formulated with 15 essential vitamins and minerals. Developed by pediatricians and parents, the company’s products are made in the USA using carefully selected ingredients, including monk fruit as a natural sweetener instead of sugar. Hiya Health’s product range also includes organic fruits and vegetables designed to support children’s healthy growth and development.
To increase revenue while improving the customer journey, Hiya Health wanted to introduce post-purchase upsell functionality within its existing Shopify store.
The platform was designed for:
The solution needed to:
Although CartHook offered Shopify compatibility, integrating it into a customized Shopify store required careful implementation to ensure existing features and custom development remained unaffected.
To implement a reliable post-purchase upsell experience, SynergyTop delivered:
The solution enabled post-purchase offers without affecting the store’s existing functionality or customer experience.
| Steps | Process Details | Deliverable |
| CartHook Integration | SynergyTop integrated the CartHook application into the client’s Shopify store while ensuring compatibility with existing custom development. | Result: Stable post-purchase upsell functionality. |
| Custom Configuration | The plugin was configured according to the client’s business requirements so that upsell offers appeared at the appropriate stages of the customer journey. | Result: Personalized post-purchase shopping experience. |
| Compatibility Optimization | Existing Shopify customizations were preserved throughout the integration process to ensure uninterrupted store functionality and design consistency. | Result: Seamless integration without disrupting existing features. |
| Testing & Quality Assurance | Comprehensive testing was performed to verify performance, functionality, and user experience before deployment. | Result: Reliable and fully functional Shopify integration. |
Integrated a third-party upsell solution without affecting existing Shopify customizations.
Targeted offers are presented after checkout to encourage additional purchases.
The integration was tailored to work alongside the client’s existing custom development.
Extensive testing ensured a stable deployment and consistent customer experience.
The solution supports higher average order values through strategic upselling.
Hiya Health launched a fully functional post-purchase upsell system within its Shopify store.
Strategic post-purchase offers create additional opportunities to increase average order value.
The integration preserves the existing shopping journey while introducing relevant upsell offers.
Custom development remained fully functional throughout the integration process.
The solution provides a scalable foundation for future marketing and conversion optimization initiatives.
| Aspect | Before Solution | After Solution |
| Post-Purchase Upselling | Not available | CartHook-powered upsell system |
| Shopify Integration | Standard functionality | Customized third-party integration |
| Revenue Opportunities | Standard checkout | Post-purchase upsell offers |
| Store Compatibility | Existing custom development | Fully preserved custom functionality |
| Testing | No upsell validation | Comprehensive integration testing |
| Customer Journey | Standard purchase flow | Enhanced post-purchase experience |
Shopify
CartHook
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