No, PreOrder Now is not fully compatible with the Rebuy app at this time.
What’s the Issue?
There are known conflicts between PreOrder Now and Rebuy, particularly in the cart drawer and checkout. These issues include:
Preorder items are not being added correctly to the Rebuy cart drawer.
Discounts not applying as expected.
Checkout interruptions caused by incompatibility with Draft Orders.
PreOrder Now uses Draft Orders to apply discounts and support partial payments (legacy feature), which Rebuy does not currently support. As a result, preorder behavior and discount functionality may break when both apps are used together.
Temporary Workaround
To avoid disruptions:
Disable Rebuy if you plan to use preorder features and discounts from PreOrder Now.
Alternative Option
If you need to use discounts with Rebuy:
Consider using the Shopify Purchase Options (new selling plan).
These do not rely on Draft Orders and are compatible with Rebuy's checkout flow.