Rendered Fits: AI Size Chart vs SizeGuide
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 11, 2026 for Rendered Fits, Oct 13, 2026 for SizeGuide.
The short answer
- Only Rendered Fits lists a free plan. Paid plans start at $19/month for Rendered Fits and $19.99/month for SizeGuide.
- Rendered Fits lists 2 features SizeGuide’s listing doesn’t mention, including Descriptions, Structured data.
Head to head
Free
Plus
Pro
Pro
- · Returns analytics
- · Table & AI recommendations
- · Unlimited size charts
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureAI shopping assistants answer "which size should I buy?" from the product data Shopify sends them. A chart saved as an image, a pop-up or a separate page never reaches them, and a table arrives as a row of numbers. AI Size Chart finds the charts already in your descriptions, product fields and size guide pages. You approve each one.
Online shoppers can't try items on, so they guess their size — and wrong guesses become returns. SizeGuide adds a "Find my size" button to your product pages. Shoppers answer a few questions and get a clear size recommendation from your own measurement charts, or an AI mode that adapts to fit preferences. Create unlimited charts, assign them by tag, collection, or product, and import sizes from CSV.
- Finds the size charts already in your descriptions, fields and size guides
- Writes an AI description with your chart, ready for Shopify Catalog mapping
- Shows what AI assistants receive for each product, today and with your chart
- You approve every chart, and it is shown exactly as you wrote it
- Instant size recommendations via a "Find my size" button on product pages
- Smart size grids assigned automatically by product tag or collection
- AI mode powered by Claude for fit-aware, personalized recommendations
- Analytics dashboard to track top sizes and flag return-prone products
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  SizeGuide | |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | Not enough data | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | SizeGuide | |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | SizeGuide | |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $19/month(ahead) | $19.99/month |
| Longest free trial | Not listed | 14 days |
| Plans listed | 3 | 1 |
Listing
| Measure | SizeGuide | |
|---|---|---|
| Shopify category rank | Not enough data | #341 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Nov 11, 2026 | Jun 12, 2026 |
| Languages | 1 | 1 |
| Developer | Rendered Fits | FH-Agency |
FAQ
Rendered Fits and SizeGuide: common questions
- Is Rendered Fits or SizeGuide cheaper?
- Only Rendered Fits lists a free plan. Paid plans start at $19/month for Rendered Fits and $19.99/month for SizeGuide. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Rendered Fits lists 2 the others don’t mention, such as Descriptions, Structured data. SizeGuide lists 1 the others don’t mention, such as Variants. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 11, 2026 for Rendered Fits, Oct 13, 2026 for SizeGuide; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 11, 2026 for Rendered Fits, Oct 13, 2026 for SizeGuide. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.