You can manually set the sale prices for selected products on Spocket without having to use discount codes.
Here's how you set a compare at price:
From the Spocket app, head over to the Imports Page and click on the Variants tab
Select the product you want to put on sale
Set the Compare at Price, which is the original price of the product
Next, set the Sales Price, which is the price you want your customer to pay. The value in the sale price should always be lower than the compare at price
Finally, when you have updated the price as well as the description and other settings, hit Save and Push to Store