With Boost Sales, buy one get another for free is never that easy. By creating a bundle of 2 same items, and then apply a half of total price, you have a sweet BOGO offer like this.
Here is the step-by-step instruction to create this offer:
Step 2. Enter other necessary information of your offer and Select a product twice to bundle them together in your cross-sell offer
Step 3. Enter the discount price then hit Save & Submit offer
Done! Let's boost your sales with the sweet BOGO offer.