Here are top Shopify apps merchants use for free-gift (GWP/BOGO) promotions, with what each is best at and price/free-plan notes so you can pick quickly.

Recommended apps (short list)

• BOGOS / Free Gifts (Secomapp) — Powerful rule engine for free-gift, BOGO, bundles and discounts; widely used and highly rated for flexible campaigns and auto-add to cart. Good if you need lots of offer types and fast setup. Pricing varies; free trial/support available. (secomapp.com)

• EG Auto Add to Cart Free Gift (EasyGift) — Simple, reliable auto-add free-gift rules (cart value, product triggers, scheduling). Good for straightforward “spend X, get Y” campaigns. Plans from ~$14.99/mo; free trial available. (apps.shopify.com)

• qikify Upsell BOGO & Free Gift — Strong all-around upsell + free-gift features, cart/checkout widgets, and a usable free tier; good if you want both in-cart offers and one-click upsells. Free plan + paid tiers. (apps.shopify.com)

• Monk Free Gift + BOGO + Cart Upsell — Full-featured (progress bars, multiple gift types, checkout support for Plus stores). Best for stores that want a single app covering banners, cart and checkout-level gifts. Starts around $49/mo. (apps.shopify.com)

• Corner Cart Upsell & Free Gift — Excellent cart-drawer experience (let customers choose gifts, uses normal inventory so you don’t need $0 SKUs). Very merchant-friendly free plan + paid tiers. Good when UX in the cart matters. (apps.shopify.com)

• Salepify — Easy setup for auto-add gifts, cart progress bars and volume discounts; a solid mid-priced option with a free starter plan. Good if you want an intuitive UI and helpful support. (apps.shopify.com)

• Kite: Discount & Free Gift — Built on Shopify Discount Functions (less “hacky” approach), supports auto free gifts, BOGO, progress bars; has a free/low-cost tier for basic use. Good if you want Shopify Functions compatibility. (apps.shopify.com)

• CartKing (CartKing‑Free Gifts BuyX GetY) — Auto-add gifts, tiered gifts, and low-cost starter/free plan for small volumes; handy if you want a low-cost entry with upgrade paths. (apps.shopify.com)

• Gift Box • Gift with Purchase (Digismoothie) — Straightforward GWP app with multi-language support and cart auto-add; good for stores that want clear GWP displays and scale-priced plans. (apps.shopify.com)

Which one to pick (quick guide)

• Want a free/cheap starter option to test GWP? Try qikify, Kite or CartKing (they offer free tiers/trials). (apps.shopify.com)
• Need advanced rules, lots of campaign types and enterprise reliability? Consider Secomapp (BOGOS), Monk or Salepify. (secomapp.com, apps.shopify.com)
• Want the best cart UX (customers choose gifts inside the cart)? Corner Cart is built for that. (apps.shopify.com)
• Using Shopify Plus or need checkout-level gifts? Check apps that explicitly support checkout/Plus (Monk, some Kite/Secomapp features) and confirm with the app before purchase. (apps.shopify.com)

Quick setup tips (to avoid problems)

• Prefer apps that “auto-add” gifts without creating $0 SKUs (many apps like Corner/Qikify/Gift Box support using regular inventory). That avoids inventory confusion. (apps.shopify.com)
• Test campaigns on a development store and verify tax/shipping behavior for free items (free items can affect shipping rules and tax in some setups). (Best practice — double-check with app docs/support.)
• Check order-volume or order-count limits on free plans (many apps restrict the free plan to a number of orders per month). (apps.shopify.com)

If you want, I can:

• Narrow recommendations to your store size/budget (small store vs. high-volume), or
• Compare 2–3 apps side-by-side (features, limits, pricing) you’re considering.

Which option do you want next?