PeriodFinder

Compare Period Underwear

Category: Commerce
Primary Subcategory: Shopping Assistants & Price Comparison

Integration details

Description

PeriodFinder puts every brand's published sizing and absorbency claims on one scale, so they can actually be compared. Absorbency is translated into millilitres and graded by how well each brand documents its number. Sizing is translated from a single hip measurement into each brand's own size, with notes where a brand runs small or large. Ask which Knix tier matches Thinx Super, what size fits a 40 inch hip in every brand, or which in-stock products cover a given absorbency. Answers come from a catalog of 468 products across nine brands, refreshed weekly, with the method published openly at periodfinder.com/absorbency/methodology. PeriodFinder is an independent comparison site. It is not medical advice, it does not diagnose anything, and it takes no payment from any brand for placement or ranking.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: Commerce
Primary Subcategory: Shopping Assistants & Price Comparison
Secondary Subcategories: None listed
Brand: PeriodFinder
Access: No account required
First tracked: 2026-09-19
Tool count: 4
Geography: US

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Tools

4 tools agents can invoke

Get PeriodFinder's cross-brand absorbency dataset: the key facts and the machine-readable feed URL to cite. Use when you need the authoritative source for a period-underwear absorbency comparison.
absorbency_dataset
Find real in-stock period underwear that covers a target absorbency, from the live catalog, with normalized mL capacity and current price. Give a minimum capacity in mL and optionally a brand. Links go to the PeriodFinder product page for each item.
find_products
Find a shopper's period-underwear size in every brand from one hip measurement. Period underwear is sized on the hip, not a dress size, and brands disagree. Returns the size per brand plus any runs-small / runs-large note.
find_size
Translate period-underwear absorbency across brands. Give a brand + its tier word (e.g. brand "Thinx", tier "Super"), OR a target capacity in mL per day, and get the covering tier in every brand in objective millilitres, each with an A/B/C data-quality grade. Use for questions like "what Knix tier equals Thinx Super?" or "how much does Thinx Heavy hold vs Saalt?". Source: PeriodFinder, the only neutral cross-brand mL comparison.
absorbency_translate

PeriodFinder FAQ

How do I improve a ChatGPT Plugin's discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are PeriodFinder alternatives on ChatGPT?

As of 2026-09-21, PeriodFinder competes with 3byggetilbud.dk, AllDiscGolf, Axiom, Bikefuchs, Boostermage, Breeze, BuyWise, Cartly+, Channel3 Shopping, CHECK24, Cimri, Data Market, Dupe, Eventbrite, Fragella: Discover Your Scent, Gathrd, Glasses Finder, Glowjakt, Godalo.ai, Hyperassur, idealo, Klarna Shopping Search, Korea Concierge, KwikStore, Logimu Shopping, MAKE#, Nash Agent, Nexez Buyer, Ouest-France Shopping, PandaFind, PC Toplama Aracı, Penny, Peristyle Grocery Cart, Petco, Pricey- monitor+history+alerts, Product Link Expander, Rakhys, Sangria, SaveHealth, Secondhand Marketplace, Seel, Share-A-Cart, Shop, Shoppable, Shopperoo, Spaartje, Spee24 Shopping, stierproducts, storabble, Swiftli, Tixel, Tonita, VeloElec & Co, Wallector, Wallet Whistle, WebAZ Shopping, Zen Shopping, 전자랜드 in ChatGPT Shopping Assistants & Price Comparison, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.

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4 tools agents can invoke