Shopify Functions builders compared: SMART Functions Creator vs SupaEasy, Nexus, PowerX, and Function Studio
Updated · SMART Functions Creator (E-TRADE PARTNER)
Five apps let merchants build general Shopify Functions without code. All five charge on live stores and offer free use on development stores. Four charge $29 to $399 per month; SMART Functions Creator charges $19.99 to $39.99 per month after a 7-day free trial, with every feature on both plans. The other apps have things we do not, notably AI rule drafting and, in one case, a built-in tester; this page lists both sides.
5.0 · SMART Functions Creator builds this as a Shopify Function, no code.
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Facts below come from each app's public Shopify App Store listing, checked on 2026-09-04. SMART Functions Creator pricing reflects the plans introduced on 2026-10-07. Prices and review counts move; treat them as a dated snapshot. Competitor names are trademarks of their owners.
Side by side
| SMART Functions Creator | SupaEasy | Nexus | PowerX | Function Studio | |
|---|---|---|---|---|---|
| Price | $19.99 to $39.99/mo | $49 to $399/mo | $29.99 to $199.99/mo | $39 to $299/mo | $29 to $199/mo |
| Free tier | Development stores only; 7-day free trial | Development stores only | Development stores only | Development stores only | Development stores only |
| Rating and reviews | 5.0 from 110+ | About 230 reviews | About 33 reviews | About 35 reviews | About 19 reviews |
| Discount functions | Product, order, volume, shipping, BXGY, bundle | Yes | Yes | Yes | Yes |
| Payment and delivery customizations | Yes, hide, move, rename | Yes | Yes | Yes | Yes |
| Cart and checkout validation | Yes | Yes | Yes | Yes | Yes |
| Cart transform | Merge, expand, update (update is Plus or dev stores) | Yes | Yes | Yes | Yes |
| AI rule drafting for merchants | No | Yes, with credit packs | Yes | Not listed | Yes |
| In-app tester | No | Not listed | Not listed | Not listed | Yes, on a paid tier |
| Rule count limits | Tiered: 2 active functions on Lite, no app limit on Pro; Shopify's 25 active limits apply | Tiered | Tiered | Tiered | Tiered |
Where SMART Functions Creator is the better fit
- You want the logic Shopify Scripts used to provide, on a Basic, Grow, or Advanced store, from $19.99 per month.
- You want every feature on the entry plan. Plans differ only in active function count; AND/OR logic and metafield conditions, which rule-specialist apps often gate behind higher tiers, are on both.
- You want your rule checked before it goes live. Fast support in the app chat builds and reviews rules with you.
- You want line item property, metafield, subscription, customer order count, and cart attribute conditions on every plan.
Where another app may fit better
- You want to describe a rule in plain language and get a draft. SupaEasy, Nexus, and Function Studio offer AI drafting; we do not offer it to merchants today.
- You want a built-in cart simulator. Function Studio lists one on a paid tier; we test with real carts and support.
- You need to import or export rules between stores. PowerX lists staging import and export; ours is on the roadmap, not shipped.
- You need custom code executed. No public app is allowed to run merchant-written function code; SupaEasy works around this with a hosted custom app, at its higher tiers.
Things every builder shares
All five build on Shopify Functions and remain subject to the relevant API and plan restrictions. Their editors expose different operations, so verify the exact workflow you need. For example, the current SMART Functions Creator editor does not expose discount-code rejection, while Shopify's Discount Function API now supports an enteredDiscountCodesReject operation. A discount Function also does not add a gift product to the cart; auto-add requires a storefront feature.
Try it free for 7 days
SMART Functions Creator plans start at $19.99/month, with every feature on both plans. 5.0 stars from 110+ Shopify App Store reviews.
Start free trial5.0 stars · 110+ reviews
Frequently asked questions
›What does SMART Functions Creator cost on a live store?
Lite is $19.99/month for up to 2 active functions and Pro is $39.99/month for unlimited active functions, both after a 7-day free trial. Development stores are free, and stores that installed before October 7, 2026 keep the app free. The other four general builders also offer free use on development stores.
›Does SMART Functions Creator have AI rule building?
Not for merchants today. SupaEasy, Nexus, and Function Studio offer it. Support in the app chat helps draft rules.
›Which app can run my old Ruby script?
None of them directly. Shopify does not allow public apps to execute merchant-written function code. Every builder recreates the logic as rules.