Can I A/B test product prices? (Essential CRO Split AB Testing app)

No. Essential A/B Testing doesn't change a product's price for different visitors, so it can't run a price test.

The app tests templates (two versions of a page in the same theme) and themes (two different themes). The product, its price, inventory and other product data stay the same in both versions.

If price testing would help you, let us know and we'll add your vote to the feature request.