Buy Again / Frequently Ordered is an OpenCart 4 customer account extension that adds a dedicated Buy Again page under My Account.
It helps returning customers quickly reorder products they’ve purchased before by showing:

Frequently Ordered Products (items ordered multiple times)

All Previously Purchased Products (unique history, latest orders first)
[list]Fast Add to Cart actions with quantity support

Optional Add Multiple / Add All to Cart flow for bulk reordering

The extension is designed to reduce reorder friction, improve convenience for repeat buyers, and increase repeat sales without changing the core checkout flow.

Key Advantages

Boosts repeat purchases by making reordering one-click easy.

Improves customer experience with personalized purchase history.

Saves customer time by avoiding manual product search.

Increases average order value through multi-add reorder behavior.

Encourages loyalty with a practical post-purchase account feature.

Works with OpenCart-native cart actions for reliable compatibility.

Admin configurable (enable/disable, minimum order count, product limits).

Handles real-world edge cases (guest redirect, disabled/deleted products, stock visibility).

Scalable logic with optional event-based optimization hooks.

Clean OpenCart 4 MVC architecture with language-based text for easy localization.