JustFits vs Smart Size Chart & Size Guide
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Feb 19, 2026 for JustFits, Nov 9, 2026 for Smart Size Chart & Size Guide.
The short answer
- Only Smart Size Chart & Size Guide lists a free plan.
- Smart Size Chart & Size Guide lists 20 features JustFits’s listing doesn’t mention, including Color and font, Comparison table, Conditional logic.
Head to head
Stunning size charts to increase sales and reduce returns.
- Australia
- United States
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 2 size charts
- · Automatic unit conversion
- · Create from image with AI
- · International sizing
- · Mobile-optimized design
- · No watermark
Starter
- · 10 size charts
- · AI translations
- · Advanced design & customization
- · Everything in Free
- · Fit scale (true-to-size bar)
- · Multi-language
Growth
- · Everything in Starter
- · Unlimited size charts
Pro 100
- · 100 users/month - Unlimited fit quiz
- · AI and rule-based matching
- · AI fit quiz: Find my size
- · Everything in Growth
- · Fit finder for pets
- · Fit finder or men, women & kids
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureJustFits helps merchants create visual size charts and fit guides for apparel, shoes, and accessories. Upload size data via CSV, assign charts to products or collections, and preview everything directly in Shopify Admin. Improve customer confidence, reduce returns, and keep your product pages clean and consistent.
Build size charts, size guides and fit quizzes in minutes with SmartSize AI and a modular editor. Bulk import and export, upload an image or start from templates for men, women, kids and pets. Add tabs, AI translations, unit conversion and international sizing. Turn on "Find my size", an AI fit quiz and size recommender for clothes and shoes. Shoppers answer once and are remembered on every product and visit.
- Upload and manage size charts easily via CSV import.
- Assign charts to products, collections, or categories.
- Preview size charts directly inside Shopify Admin.
- Create reusable templates for consistent store design.
- Optimized size charts and size guides on mobile and desktop.
- Optional conversion cm / inches in every size table and size guide.
- Personalized styles that match your store's theme: font style, colors and icons.
- Templates for shirt, dress, bikini, top, bottom, shoes, jewelry and more.
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 |  JustFits |  Smart Size Chart & Size Guide |
|---|---|---|
| Detected stores | Not published | 2 |
| Net store change, 28 days | 0 | +1 |
| Stores added, 28 days | Not enough data | 1 |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Apparel & Accessories |
| Top store countries | Not published | Australia, United States |
Reviews
| Measure | JustFits | Smart Size Chart & Size Guide |
|---|---|---|
| App Store rating | Not published | 4.9 ★ |
| App Store reviews | Not published | 152 |
| New reviews, 28 days | Not enough data | 8 |
| Reviewers a year or more in | Not enough data | 12% |
Pricing
| Measure | JustFits | Smart Size Chart & Size Guide |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | No monthly plan listed | $9/month |
| Longest free trial | Not listed | 14 days |
| Plans listed | Not published | 4 |
Listing
| Measure | JustFits | Smart Size Chart & Size Guide |
|---|---|---|
| Shopify category rank | #179 | #9(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | Yes |
| Launched | Nov 25, 2025 | Jan 28, 2022 |
| Languages | 1 | 8 |
| Developer | Go big or go home | SmartSize |
FAQ
JustFits and Smart Size Chart & Size Guide: common questions
- Is JustFits or Smart Size Chart & Size Guide cheaper?
- Only Smart Size Chart & Size Guide lists a free plan. 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?
- Smart Size Chart & Size Guide lists 20 the others don’t mention, such as Color and font, Comparison table, Conditional logic, Custom CSS. 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 Feb 19, 2026 for JustFits, Nov 9, 2026 for Smart Size Chart & Size Guide; 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 Feb 19, 2026 for JustFits, Nov 9, 2026 for Smart Size Chart & Size Guide. 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.