AI recommendation leaderboard
Which size charts & fit apps do AI assistants recommend? (October 2026)
We asked ChatGPT, Claude and Gemini 50 questions Shopify merchants ask about size charts & fit, several times each, with web search on and off: 298 answers in all. Kiwi Sizing was recommended most.
Measured 1 October 2026.
| # | App | Share of voice | Named in |
|---|---|---|---|
| 1 | Kiwi Sizing Top pick in Gemini, Claude |
19% | 51% |
| 2 | Smart Size Chart Top pick in ChatGPT |
11% | 28% |
| 3 | MP Size Chart | 10% | 29% |
| 4 | CSC Size Chart | 7% | 19% |
| 5 | BF Size Chart | 5% | 13% |
| 6 | Easysize | 2% | 7% |
| 7 | Easy Size Chart | 2% | 5% |
| 8 | ESC Size Chart | 2% | 8% |
| 9 | Goodsize | 1% | 3% |
| 10 | Sizebay | 1% | 2% |
Share of voice: the app's share of all app mentions. Named in: answers that mention it at all. First pick: answers where it is the first recommendation.
Pages the assistants cite most
With web search on, these third-party sites showed up most often in answers. Being described well on them is one of the few levers an app developer has.
- apps.shopify.com53% of search answers
- pickyourapp.com21% of search answers
- bogos.io21% of search answers
- vertexaisearch.cloud.google.com19% of search answers
- letsmetrix.com14% of search answers
- ecomposer.io13% of search answers
Method
Questions are written to sound like real merchants: different store types, sizes and budgets, comparisons, migrations, and problems that do not name the category. Each is asked several times per assistant because answers vary. Apps are matched by name and known aliases. AI answers change often; treat small differences as noise. AppNod is independent and not affiliated with Shopify, OpenAI, Anthropic, Google or any app listed.