Fit Quiz: Size Recommender vs SizeEcho
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 2, 2026 for Fit Quiz, Nov 13, 2026 for SizeEcho.
The short answer
- Only SizeEcho lists a free plan. Paid plans start at $29/month for Fit Quiz and $29/month for SizeEcho.
- Fit Quiz lists 11 features SizeEcho’s listing doesn’t mention, including AI recommendations, Collection page, Custom CSS.
Head to head
Accurate size recommendations, no measurements or size charts!
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Starter
- · Design customization: colors/icons/text
- · Multi-lingual
- · Performance dashboard
- · Size recommendations for shoes & apparel
- · Standard support: 72h
- · Unisex support
Pro
- · Advanced reports
- · Advanced unisex support
- · All features of Starter plus:
- · Fit/width/length recommendations
- · Multiple size scales(UK/US/EU etc.)
- · Pro support: 48h
Premium
- · Advanced customization
- · All features of Pro plus:
- · Custom recommendation logic
- · Custom reports
- · Premium support: 24h
- · White-labeling
Free
- · 75 fit responses / month
- · Overview, Products, Sizes
- · Requires Klaviyo
Core
- · 500 fit responses / month
- · Overview, Products, Sizes
- · Requires Klaviyo
Scale
- · 2,500 fit responses / month
- · Product CSV export
- · Recipe pack for Flows
- · Requires Klaviyo
- · Size watchlist + thresholds
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureHelp shoppers find the right size & fit in under 15 seconds. Fit Quiz gives personalized clothing & footwear recommendations at the SKU-level using real fit data. It covers size, fit, width, and length for each product. Shoppers do not enter weight, height, age, body measurements, or body scans. It supports unisex sizing and 20 languages. Customize the design to match your brand.
SizeEcho shows apparel merchants which products and sizes run too small, true to size, or too big, using buyer answers after an order ships. After fulfillment it waits a delay you set, then sends one event to Klaviyo. Your Klaviyo Flow emails the fit check-in. Answers land in Overview, Products, and Sizes so you can improve size guides and product copy. Requires Klaviyo. SizeEcho does not email buyers itself.
- More sales and fewer returns for clothing and footwear brands (including unisex)
- Customise the design (colours, fonts, icons) and enable multi-language support
- Easy to set up, no size charts or garment measurements required
- Easy to use for first-time shoppers and automatic recommendations for regulars
- See which products and sizes run small or large from buyer fit answers
- After shipping, send a fit check-in through your Klaviyo Flow
- Buyers pick too small, true to size, or too big (optional reasons)
- Review answers in Overview, Products, and Sizes to fix size guides
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 |  Fit Quiz | |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | Not enough data |
| 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 | Fit Quiz | |
|---|---|---|
| App Store rating | 4.1 ★ | Not published |
| App Store reviews | 39 | Not published |
| New reviews, 28 days | 2 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Fit Quiz and SizeEcho: common questions
- Is Fit Quiz or SizeEcho cheaper?
- Only SizeEcho lists a free plan. Paid plans start at $29/month for Fit Quiz and $29/month for SizeEcho. 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?
- Fit Quiz lists 11 the others don’t mention, such as AI recommendations, Collection page, Custom CSS, Drag and drop editor. SizeEcho lists 4 the others don’t mention, such as Analytics dashboard, Customer satisfaction, Email, Product feedback. 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 2, 2026 for Fit Quiz, Nov 13, 2026 for SizeEcho; 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 2, 2026 for Fit Quiz, Nov 13, 2026 for SizeEcho. 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.