Bid Online Auction is a Shopify app that helps merchants add live and timed auctions to their online stores. Designed for straightforward setup without coding, it works with existing Shopify products and lets sellers configure auction dates, starting bids, and optional reserve prices. The app offers real-time bidding tools, including customizable bid increments, proxy bidding, and popcorn bidding, which extends an auction when bids arrive near closing time. Merchants can also set buyout prices so customers can purchase an item immediately, and use reserve prices to define a minimum acceptable sale amount.

Additional features vary by plan and include auctions for product collections, product variants, multilingual support, currency options, email and outbid notifications, manual winner selection, and tools for relisting unsuccessful auctions. Higher-tier plans add options such as Dutch and evergreen auctions, group orders, wishlists, and auction display controls. Bid Online Auction offers a free plan alongside paid subscription tiers. Its website also provides setup guidance, feature comparisons, support resources, and customer reviews.