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FitCard

TechCrowds, LLC v1.1.0

Shirt sizes from your shirts

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From the developer

Declared capabilities

  • Pick the size to buy in a shirt from shirts you own
  • Recommend shirts that will fit, each in the right size
  • Look up a shirt's garment measurements by size

Cost & access

FitCard doesn't sell anything or take payments. Some shop links are affiliate links (for example Amazon Associates), which go to product or search pages, never to a checkout. A commission never changes the size FitCard recommends.

Declared limitations

  • Women's clothing
  • Shoes
  • Styling, not sizing

Onboarding example

My Uniqlo AIRism tee in L fits great. What size in the J.Crew Broken-in tee?
Sources & dates

Developer declarations; not independently tested. Listing last checked Nov 9, 2026. Package observed Nov 9, 2026.

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Description

From the marketplace listing

Size charts tell you who a size is meant for, not how the shirt will fit. Most brands publish body charts ("L is for a 41-44 inch chest"), and those can't tell two shirts apart. Six Uniqlo Larges, all "for a 41-44 inch chest", measure 41.5 to 50.5 inches around. FitCard works from shirts you already own. Name 3-5 shirts that fit you well (brand, item and size), plus any that don't and where they're off (tight in the belly, rides up). FitCard compares their real garment measurements with the shirt you're looking at. You get one size and why, in terms of your own shirts ("fits like your Buck Mason L, 1 inch roomier"). You also get how it will fit at the chest, belly and length, and how sure it is. Ask it: - Which size to buy in a specific shirt. - Which shirts will fit you, each in the right size, with a link to the shop and to your full FitCard on fitcard.ai. - A shirt's garment measurements in every size. The measurements come from brand charts, wholesale spec sheets and shirts measured by FitCard users with their phones. If one of your shirts isn't known yet, FitCard says so, and you can measure it with your phone at fitcard.ai. Sign-in is optional. Without it, FitCard only sees the shirts you name in the chat. Connect your FitCard account (email and a one-time code, no password) and FitCard remembers your shirts: say "my Uniqlo tee in L fits great" and it's saved, then sizes every new shirt from your closet without asking again. The same closet is on fitcard.ai and in the FitCard Chrome extension. For men buying tees, polos and button-downs. Not for women's clothing, shoes or pants. FitCard never asks for your body measurements. Sizes are an estimate, so check the shop's return policy. Some shop links are affiliate links; a commission never changes the size.

Language: English · Automatically detected from descriptions.

ChatGPT marketplace listing ↗Website ↗Privacy policy ↗Terms ↗Support ↗

Matches for “changes”

Exact text from the indicated source. A mention alone does not establish support for your task.

Publisher full description

Size charts tell you who a size is meant for, not how the shirt will fit. Most brands publish body charts ("L is for a 41-44 inch chest"), and those can't tell two shirts apart. Six Uniqlo Larges, all "for a 41-44 inch chest", measure 41.5 to 50.5 inches around. FitCard works from shirts you already own. Name 3-5 shirts that fit you well (brand, item and size), plus any that don't and where they're off (tight in the belly, rides up). FitCard compares their real garment measurements with the shirt you're looking at. You get one size and why, in terms of your own shirts ("fits like your Buck Mason L, 1 inch roomier"). You also get how it will fit at the chest, belly and length, and how sure it is. Ask it: - Which size to buy in a specific shirt. - Which shirts will fit you, each in the right size, with a link to the shop and to your full FitCard on fitcard.ai. - A shirt's garment measurements in every size. The measurements come from brand charts, wholesale spec sheets and shirts measured by FitCard users with their phones. If one of your shirts isn't known yet, FitCard says so, and you can measure it with your phone at fitcard.ai. Sign-in is optional. Without it, FitCard only sees the shirts you name in the chat. Connect your FitCard account (email and a one-time code, no password) and FitCard remembers your shirts: say "my Uniqlo tee in L fits great" and it's saved, then sizes every new shirt from your closet without asking again. The same closet is on fitcard.ai and in the FitCard Chrome extension. For men buying tees, polos and button-downs. Not for women's clothing, shoes or pants. FitCard never asks for your body measurements. Sizes are an estimate, so check the shop's return policy. Some shop links are affiliate links; a commission never changes the size.

What changed

· 4 observations

Capabilities & instructions

Capabilities updated; open the comparison for details. Long description changed from “For men buying tees, polos and button-downs. Not for women's clothing, shoes or pants. No sign-in. FitCard only sees the shirts you name and” to “Sign-in is optional. Without it, FitCard only sees the shirts you name in the chat....

View comparison →
Capabilities & instructions

Full description changed from “fit. Use when he asks what size to buy in a shirt, tee, polo or button-down, which shirts will fit him, or a shirt's garment measurements.” to “fit, and keep those shirts on his FitCard. Use when he asks what size to buy in a shirt, tee, polo or button-down, which shirts will fit him,...

View comparison →
Capabilities & instructions

Capabilities updated; open the comparison for details. Long description changed from “For men buying tees, polos and button-downs. Not for women's clothing, shoes or pants. No sign-in. FitCard only sees the shirts you name and” to “Sign-in is optional. Without it, FitCard only sees the shirts you name in the chat....

View comparison →

Technical updates · 1

Package or technical metadata updated

View technical comparison →

Keywords

Files & skills

File archives

Plugin package5 files · 9.11 KBBrowse files →
Skill instructions
fitcard1.38 KB

View saved version →

---
name: fitcard
description: Pick a man's size in a shirt from shirts he already owns that fit, and keep those shirts on his FitCard. Use when he asks what size to buy in a shirt, tee, polo or button-down, which shirts will fit him, a shirt's garment measurements, or to save or change the shirts on his FitCard.
---

# FitCard

FitCard compares a shirt's real garment measurements with shirts he already owns that fit.

1. Ask for 1-5 shirts that fit him well: brand, item and size. Shirts that don't fit help too; pass
   where they're off as `chest`, `belly` or `length`.
2. Call `size_me` for one shirt, `what_to_buy` for recommendations, or `shirt_measurements` for a
   shirt's measurements.
3. Report the size FitCard gives, its one-line reason and the confidence. Pass only what he tells
   you; don't invent measurements.
4. If one of his shirts isn't known yet, tell him he can measure it with his phone at fitcard.ai.
5. A size is a best estimate, so mention he should check the shop's return policy.
6. If he wants FitCard to remember his shirts, use `add_shirt` (or `my_closet` to see them). He'll be
   asked to connect his FitCard account. Once he's connected, `size_me` and `what_to_buy` use his
   saved shirts, so don't ask him to list them again; save a shirt with `add_shirt` whenever he says
   how one fits. `remove_shirt` and `update_fit_preferences` change his FitCard when he asks.

Release notes

Optional sign-in (Sign in with FitCard, OAuth with email and a one-time code). Signed in, FitCard keeps his shirts and fit settings: new tools my_closet, add_shirt, remove_shirt and update_fit_preferences, and size_me and what_to_buy use his saved shirts. Everything from 1.0 still works without an account.

Declared in the saved package. Remote tools may change independently.

Package details

Publisher declarations from the archived package. These are separate from our research and the live service's terms.

Package author
TechCrowds, LLC
Keywords
See keywords
Commerce declaration
Does not support commerceThis does not establish whether access is free or paid.
Review scenarios
5 positive · 3 negativeScenario counts, not test results.

Declared capabilities

  • Pick the size to buy in a shirt from shirts you own
  • Recommend shirts that will fit, each in the right size
  • Look up a shirt's garment measurements by size
  • Save your shirts to your FitCard account, the same on fitcard.ai and in the Chrome extension

Package observed Nov 9, 2026.

plugin.json
Technical details
First seen
Nov 3, 2026 · 18:00 UTC
Last seen
Nov 9, 2026 · 00:00 UTC
Latest observed change
Nov 5, 2026 · 06:00 UTC
Collection status
Collected

plugin_asdk_app_6ae955cd30788191b5e0bd6abd20208e

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