Shopify is the most popular platform for running flash sales, and for good reason — its discount system is flexible, its checkout is fast, and its app ecosystem is huge. Here's the exact process we recommend for setting up a flash sale that converts.
Head to Discounts → Create discount in your Shopify admin. Choose Percentage for broad sales or Fixed amount for specific product promotions. Set the start and end dates carefully — these dates will drive your countdown timer.
Install flashtimer from the Shopify App Store. Once connected, flashtimer reads your active discounts and automatically calculates the remaining time. You get a single GIF URL you can paste directly into your email campaigns.
Drive all email clicks to a dedicated sale landing page or collection. Make sure your Shopify theme shows remaining stock counts — combine time scarcity with availability scarcity.
After the sale, check Shopify Analytics for revenue by source. Compare email open and click rates across your three sends. The data from one sale is the brief for the next one.