How we tested
We installed each Sale badge app on a clean Dawn theme test store with 40 products, toggled on the Sale badge, and measured storefront render time before and after. We also checked whether the badge appeared on both product pages and collection pages automatically.
What matters
Three things. First, does the badge auto-detect products with a compare-at price higher than the current price. Second, does it render on both the product page and collection cards. Third, does the app ship a separate script that slows your storefront.
Our pick
For most Shopify stores, Product Badges by Win-Win Apps wins on free tier and storefront performance. Stores with very specific template requirements and no budget constraint may prefer Badgify for its deeper template library.