Rendered Fits: AI Size Chart vs ScaleChart: Size Chart & Guide
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 11, 2026.
The short answer
- Both list a free plan. Paid plans start at $19/month for Rendered Fits and $29.99/month for ScaleChart.
- Rendered Fits lists 1 features ScaleChart’s listing doesn’t mention, including Structured data.
Head to head
- Netherlands
- United States
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
Plus
Pro
Free Plan
- · AI Native Sizes Based On Market
- · Auto Unit Detection by Customer Location
- · Automatic Translation In Any Language
- · Fully Customizable Design
- · Import Charts via Product Description
- · Publish Up to 2 Size Charts
Premium Plan
- · Automatic Size Chart Generation with AI
- · Cart Drawer
- · Everything in Free Plan
- · Post Purchase Upsells
- · Quality Checks & Size Guide Alerts
- · Sticky Add To Cart
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.
When customers pick the wrong size, you lose sales and face costly returns. ScaleChart is a size chart builder that creates custom AI charts and fit advice to reduce returns. Auto-generate a chart from a photo or text, then auto-assign or bulk-apply it across products. Show it in a mobile-friendly popup, tabs, or theme-native dropdown.
- 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
- Transform supplier images into professional, interactive size charts instantly.
- Automatically transforms units and languages to match your local market needs.
- Sticky Add to cart included
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 |  ScaleChart | |
|---|---|---|
| Detected stores | Not published | 273 |
| Net store change, 28 days | Not enough data | +3 |
| Stores added, 28 days | Not enough data | 4 |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Apparel & Accessories, Home & Garden, Health & Beauty |
| Top store countries | Not published | Netherlands, United States, Australia |
Reviews
| Measure | ScaleChart | |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 54 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | 0% |
Pricing
| Measure | ScaleChart | |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $19/month(ahead) | $29.99/month |
| Longest free trial | Not listed | 14 days |
| Plans listed | 3 | 2 |
Listing
| Measure | ScaleChart | |
|---|---|---|
| Shopify category rank | Not enough data | #3 |
| Shopify App Charts | Not on this week’s charts | #8 in Product comparison |
| Built for Shopify | No | Yes |
| Launched | Nov 11, 2026 | Jan 1, 2026 |
| Languages | 1 | 1 |
| Developer | Rendered Fits | Scalechart LLC |
FAQ
Rendered Fits and ScaleChart: common questions
- Is Rendered Fits or ScaleChart cheaper?
- Both list a free plan. Paid plans start at $19/month for Rendered Fits and $29.99/month for ScaleChart. 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 1 the others don’t mention, such as Structured data. 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; 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. 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.