Side-by-side comparison · 24 data points
Product Custom Fields, Variant-Specific Text, File Upload, Price Add-ons, and Product Custom Options
| Custom Product Options, Fields | Smart Size Chart & Size Guide | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer | ||
| Listed |
Size charts, size guides and a “Find my size” AI size recommender, built in minutes
| Metric | Custom Product Options, Fields | Smart Size Chart & Size Guide |
|---|---|---|
| Rating | ★ 5.0 ★ | 4.9 ★ |
| Total reviews | 1 | ★ 142 |
| Free plan | Yes | Yes |
| Pricing | Free plan available | Free plan available |
| Built for Shopify | — | ★ Yes |
| Pricing tiers | 2 tiers | ★ 4 tiers |
| Listed features | 4 | ★ 5 |
| Review velocity (30d) | — | 5 new |
| Languages | 1 supported | 10 supported |
| Listed since | Jun 2026 | Jan 2022 |
Custom Product Options, Fields and Smart Size Chart & Size Guide are evenly matched on rating (5.0★ vs 4.9★) — the differentiator comes down to pricing fit, feature breadth, and which app's interaction pattern suits your team's workflow.
Pricing entry tiers: Custom Product Options, Fields at Free plan available, Smart Size Chart & Size Guide at Free plan available. Check each app's tier structure for the capacity limits you actually need before deciding — the headline number is the same shape, but the gating shape per tier (seats, usage volume, integrations) varies.
Smart Size Chart & Size Guide has the larger user base (142 reviews vs 1), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Custom Product Options, Fields's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat.
Recommended evaluation path: install both apps' free tiers (where available) and run them in parallel on a small cohort for 7-14 days before committing. The data tables below show the per-feature breakdown — for most merchants the deciding factor will be a single integration or workflow detail that's hard to compare from listing pages alone.
This verdict is generated from the live marketplace data on this page — rating, review count, pricing tier, and category position all refresh from the canonical Shopify App Store listing every 24 hours. AppRanks does not accept payment to influence comparison outcomes; the methodology is documented on the About page and applies identically to every pair on the site.
Read each app's audit: Custom Product Options, Fields audit • Smart Size Chart & Size Guide audit
| Last updated | — | — |
|---|
| Keyword | Custom Product Options, Fields | Smart Size Chart & Size Guide |
|---|---|---|
| conditional logic | #192 | #47 |
| Signal | Custom Product Options, Fields | Smart Size Chart & Size Guide |
|---|---|---|
| Average rating | 5.0 ★ (1) | 4.9 ★ (142) |
| Rating distribution | 5— 4— 3— 2— 1— | 597% 43% 30% 20% 11% |
| Reviews · last 7 days | — | +1 |
| Reviews · last 30 days | — | +5 |
| Reviews · last 90 days | — | +16 |
No reviews yet.
Both Custom Product Options, Fields and Smart Size Chart & Size Guide offer paid plans only. Custom Product Options, Fields starts at Free plan available; Smart Size Chart & Size Guide starts at Free plan available. Compare the per-tier features in the Pricing section above before committing.
Custom Product Options, Fields (5.0★, 1 reviews) and Smart Size Chart & Size Guide (4.9★, 142 reviews) are essentially tied on rating. Look at review velocity and individual reviewer quotes — both visible on each app's detail page — to differentiate.
Custom Product Options, Fields holds the higher average rating (5.0★ vs 4.9★). That is the one dimension AppRanks can separate them on here — read both apps' detail pages for the feature breakdown and recent listing changes.
Both apps are one-click installs from the Shopify App Store. Smart Size Chart & Size Guide has the deeper published review base (142 vs 1), which often — though not always — accompanies better-tested setup docs. AppRanks doesn't measure setup time directly: read the recent reviews on each app's detail page for user-reported install experience.
Custom Product Options, Fields typically suits early-stage and growth-mode teams based on its published review base (1 reviews). Smart Size Chart & Size Guide typically suits early-stage and growth-mode teams based on its published review base (142 reviews). A larger review base generally means the app has been exercised at scale — relevant if you are processing high volume or handling enterprise compliance requirements.
Huge shoutout to Leslie and the rest of the team! They were exceptionally fast, friendly, and an absolute joy to work with. The app itself is fantastic, and the new AI addition makes setting everything up and managing the app so much easier. The customer service truly goes above and beyond. Highly recommend to any stor
This is a great app, with phenomenal customer support. Not sure i've ever experienced such great support before. They go above and beyond, any changes you need, they are willing to help with, and respond almost immediately. One of the best teams I've ever worked with.
We recently switched to Smart Size after using our own size guides and it has really helped to streamline the appearance of our product pages, and is much more user friendly. It included most of the key features we were looking for, and the team have been so helpful and responsive with any specific changes or issues we
Migration support varies by app and category. Custom Product Options, Fields and Smart Size Chart & Size Guide both publish their export options on their marketplace listing pages (or in their support docs); some apps offer one-click import from competitors, others require CSV. The fastest check: search "import from Custom Product Options, Fields" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
