Swimwear and lingerie are the hardest categories in fashion ecommerce. Fit anxiety is at its maximum, sizing varies wildly between brands, and many customers cannot legally or practically try items in-store and return them. The result: return rates that can pass 40 percent and destroy margins.
The ten apps below are how swimwear and lingerie brands on Shopify fight back in 2026.
1. GenLook: AI Virtual Try On
GenLook lets shoppers see swimwear and lingerie on their own body from a single photo, privately, on their own device. That answers the "how will this actually look on me" question no model photo can.
GenLook: AI Virtual Try On
Built for ShopifyBoost sales and reduce returns with AI virtual try-on.
Standout feature: A private, photo-based try-on flow with a free plan and lead capture, turning hesitant browsers into email subscribers even when they do not buy immediately.
2. Antla AI Virtual Try On
Antla pairs AI try-on with size chart integration, covering the look and the fit in one widget, exactly the two doubts that block intimates purchases.
Antla AI Virtual Try On
Built for ShopifyMakes Shoppers Love How They Look With AI Fashion Try-On
Standout feature: Size chart support inside the try-on experience, so shoppers settle the size question without leaving the product page.
3. Kiwi Size Chart & Recommender
Band, cup, and bottoms sizing across international standards is a minefield. Kiwi attaches proper measurement-based charts and a recommender to every product.
Kiwi Size Chart & Recommender
Built for ShopifyCreate customizable size charts that convert + reduce returns
Standout feature: Measurement-based recommendations with automatic unit conversion, essential for brands selling across US, EU and UK sizing at once.
4. Fit Quiz: Size Recommender
Fit Quiz replaces the tape measure with a short quiz and returns a size recommendation per product. Quizzes convert better than charts for shoppers who do not know their measurements.
Reduce apparel returns with a size recommender & fit guide
Standout feature: Multi-language quizzes with unisex support, useful for brands with international audiences.
5. Jotly Size Chart & Size Guide
A simple, fast size chart builder with image support and multi-language guides. The lightweight option if a full recommender is more than you need.
Jotly Size Chart & Size Guide
Built for ShopifySize chart, size guide to help pick right size + reduce return
Standout feature: A drag-and-drop builder that produces clean visual guides, including how-to-measure illustrations that matter enormously in lingerie.
6. Returbo: Returns and Exchanges
Returns in intimates carry legal specifics, especially in the EU. Returbo manages returns, exchanges, labels and store credit and stays compliant with EU Directive 2023/2673.
Returbo: Returns and Exchanges
Built for ShopifyTurn returns into exchanges. EU Directive 2023/2673-ready
Standout feature: Built-in EU compliance, which European swimwear brands otherwise have to assemble manually from legal advice and duct tape.
7. Loox: Product Reviews & AI
Real customers photographed in your swimwear, in every body type, answer the question studio photography cannot. Loox collects and showcases those photo reviews.
Loox ‑ Product Reviews App
Built for ShopifyConvert more with visual product reviews, superpowered by AI
Standout feature: Photo review galleries that double as an inclusive lookbook, a proven conversion lever in body-sensitive categories.
8. Tolstoy: Shoppable Video & UGC
Video shows how fabric moves, fits and holds, which matters more for swimwear than any other category. Tolstoy turns those clips into shoppable product page content.
Tolstoy: Shoppable Video & UGC
Built for ShopifyShoppable videos, AI UGC, product ads, and virtual try-on
Standout feature: Shoppable UGC videos on the product page, plus AI tools to produce them when customer content is thin.
9. BOGOS: Free Gift Bundle Upsell
Swimwear sells in sets, and lingerie sells in pairs. BOGOS powers matching-set bundles, buy-two offers and free gifts that raise average order value.
BOGOS: Free Gift Bundle Upsell
Built for ShopifyTop Trusted app for Shopify free gift with purchase, BOGO & buy x get y. Used by 82,900+ Shopify Stores. Combine with Volume discounts, Bundles, and Upsells.
Standout feature: Flexible bundle and gift rules, like a free cover-up over a spend threshold, that fit seasonal swim promotions naturally.
10. Swym Wishlist Plus
Swimwear is seasonal and lingerie is often gifted. Wishlists capture intent months before purchase and feed retargeting when the season or the occasion arrives.
Swym Wishlist Plus
Built for ShopifyIncrease your store conversions with a full featured wishlist
Standout feature: Price-drop and back-in-stock alerts on wishlisted items, quietly converting winter browsers into spring buyers.
Where to start
Attack fit anxiety first: GenLook for the look, Kiwi or Fit Quiz for the size. Then make the remaining returns cheap and revenue-preserving with Returbo. Those three moves address the core economics of the category; everything else on this list compounds them.