OptToFly: Product options

OptToFly gives every product option a price of its own. Set a charge on each value of your existing Shopify options, like Color or Size, and the page shows the exact price for any combination, with zero extra variants. Build add-on sets: reusable custom option forms with swatches, buttons, dropdowns, checkboxes, radio buttons, text fields, and date pickers, so customers personalize gift wrap, engraving, and more. Link add-ons to products, charge flat fees on Shopify Plus, and track option orders