Singleton | Rich Registration vs SmartCA: Customer Attribute
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026.
The short answer
- Singleton is detected on 70× as many Shopify stores as SmartCA: 70 vs 1 as of Nov 8, 2026.
- On the Shopify App Store: Singleton 4.7 from 21 reviews and SmartCA 4.7 from 58 reviews.
- Only SmartCA lists a free plan. Paid plans start at $9.99/month for Singleton and $15/month for SmartCA.
- Singleton lists 2 features SmartCA’s listing doesn’t mention, including Custom fields, Registration forms.
Head to head
Build your own registration form with custom form fields
Add unlimited number of fields to registration and cart page
- United States
- Germany
- Canada
- United Kingdom
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Base Plan
- · All features included
Free
- · 13 field types incl. image choices
- · Cart fields saved to orders
- · Fields on register & cart pages
- · Ready-made attribute templates
- · Show cart fields by product
Pro
- · Auto-tag customers from answers
- · Conditional fields based on answers
- · Email alerts on customer updates
- · Everything in Free
- · File upload & coupon code fields
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureIt's important to know about as much as possible about customers. This app will help with better understanding of the clients habits and needs. That knowledge will allow merchant to improve it's services and finally make more profit of his business. You can create unlimited custom fields in registration form and get all required data about your customers, that cannot be done with standard registration form.
Custormer & Cart Attribute helps you to create additional fields on the customer account registration page, account page and cart page. With this app, you can get the necessary data directly from your customers in an easy way. Place fields on the registration page to know age, preferences and interests and all other information you may need.
- Add unlimited custom fields to your registration form, with own validations
- Send mail notifications for administrators after new customer is registered
- Allow to customers to edit theirs datas in theirs own accounts
- Copy customers data to "Customer Note" field, displayed in customer detail 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 |  Singleton |  SmartCA |
|---|---|---|
| Detected stores | 70(ahead) | 1 |
| Net store change, 28 days | −3 | −19 |
| Stores added, 28 days | 2 | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Apparel & Accessories, Health & Beauty, Home & Garden | Home & Garden |
| Top store countries | United States, Germany, Canada | United Kingdom |
Reviews
| Measure | Singleton | SmartCA |
|---|---|---|
| App Store rating | 4.7 ★ | 4.7 ★ |
| App Store reviews | 21 | 58(ahead) |
| New reviews, 28 days | 0 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Singleton and SmartCA: common questions
- Which is more popular, Singleton or SmartCA?
- Singleton is detected on 70× as many Shopify stores as SmartCA: 70 vs 1 as of Nov 8, 2026.
- Is Singleton or SmartCA cheaper?
- Only SmartCA lists a free plan. Paid plans start at $9.99/month for Singleton and $15/month for SmartCA. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Which has better reviews, Singleton or SmartCA?
- On the Shopify App Store: Singleton 4.7 from 21 reviews and SmartCA 4.7 from 58 reviews.
- What features does each app list that the other doesn’t?
- Singleton lists 2 the others don’t mention, such as Custom fields, Registration forms. 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 8, 2026; 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 8, 2026. 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.