JustFits vs ZG Size Guide & Fit Finder
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, Oct 13, 2026 for ZG Size Guide & Fit Finder.
The short answer
- Only ZG Size Guide & Fit Finder lists a free plan.
- ZG Size Guide & Fit Finder lists 20 features JustFits’s listing doesn’t mention, including AI recommendations, Analytics, Color and font.
Head to head
Free
- · 3 size charts
- · 7-day analytics
- · Built-in storefront UI translations in 9
- · Product and tag assignment rules
- · Table, image, and mixed chart formats
- · Template downloads
Pro
- · 90-day analytics
- · All assignment rules and global fallback
- · CSV / Excel import and export
- · Find-my-size wizard and brand offsets
- · Multi-chart tabs
- · Size-system conversion for shoes
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.
ZG Size Guide & Fit Finder helps merchants create clear size charts, fit guides, and size recommendations for product pages. Use built-in templates, import CSV/Excel files, assign charts by product, tag, collection, vendor, category, gender, or region, and show multiple guides as tabs. Shoppers can compare measurements, switch CM/IN units, use shoe size conversion, and get a recommended size through the fit finder.
- 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.
- Create size charts from templates for common apparel types
- Recommend sizes using shopper measurements and fit preference
- Show shoe size equivalents for US, UK, EU, Japan, and store sizing
- Show multiple fit or length guides as tabs on one product page
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 |  ZG Size Guide & Fit Finder |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 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 | JustFits | ZG Size Guide & Fit Finder |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 1 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | JustFits | ZG Size Guide & Fit Finder |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | No monthly plan listed | $9.99/month |
| Longest free trial | Not listed | 14 days |
| Plans listed | Not published | 2 |
Listing
| Measure | JustFits | ZG Size Guide & Fit Finder |
|---|---|---|
| Shopify category rank | #179 | #133(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Nov 25, 2025 | May 11, 2026 |
| Languages | 1 | 1 |
| Developer | Go big or go home | ZEROGRAVITYCO LIMITED |
FAQ
JustFits and ZG Size Guide & Fit Finder: common questions
- Is JustFits or ZG Size Guide & Fit Finder cheaper?
- Only ZG Size Guide & Fit Finder 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?
- ZG Size Guide & Fit Finder lists 20 the others don’t mention, such as AI recommendations, Analytics, Color and font, Comparison table. 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, Oct 13, 2026 for ZG Size Guide & Fit Finder; 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, Oct 13, 2026 for ZG Size Guide & Fit Finder. 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.