Promo King: Promos & Tracking vs SOPO Conversions
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Promo King, Nov 9, 2026 for SOPO Conversions.
The short answer
- Both list a free plan. Paid plans start at $9/month for Promo King and $24.99/month for SOPO Conversions.
Head to head
- United States
- Mexico
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
Starter
Basic Plan
- · All features included
- · Analytics
- · Email support
- · Free up to 30 orders per month
Advanced Plan
- · 30+ to unlimited monthly orders
- · All Basic Plan features included
- · Priority support
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCreate high-converting promotions directly on your storefront — no code, no theme editing required. Choose from popups, banners, slide-in toasts, product showcases, and urgency countdowns. Target the right visitors, schedule your campaigns, and watch performance data roll in as it happens.
SOPO Conversions is a conversion optimization platform designed to create engaging shopping experiences throughout the customer journey. It helps merchants encourage purchase decisions, build customer confidence and deliver a seamless buying experience.
- Easy-to-use promo editor - edit Colors, Text, Button Links, Images, Sizes
- Test your promo's success! Track how your promos turn to profit!
- A/B Tests - Split your traffic, compare results, use the version that converts
- Sticky Add to Cart Bar: Keeps the add to cart button visible
- Smart Cart Goals: Boosts AOV with real-time cart milestone rewards.
- Low Stock Counter: Real-time stock alerts create urgency and drive sales.
- Announcement Smart Bar: Countdown banners grab attention instantly.
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 |  Promo King |  SOPO Conversions |
|---|---|---|
| Detected stores | Not published | 4 |
| 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 | Food, Beverages & Tobacco, Health & Beauty, Home & Garden |
| Top store countries | Not published | United States, Mexico |
Reviews
| Measure | Promo King | SOPO Conversions |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 6 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Promo King | SOPO Conversions |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $9/month(ahead) | $24.99/month |
| Longest free trial | 7 days | 14 days |
| Plans listed | 2 | 2 |
Listing
| Measure | Promo King | SOPO Conversions |
|---|---|---|
| Shopify category rank | #200 | #27(ahead) |
| Shopify App Charts | Not on this week’s charts | #9 in Promotions - Other |
| Built for Shopify | No | No |
| Launched | Apr 24, 2026 | Jul 10, 2026 |
| Languages | 1 | 1 |
| Developer | ShopTilUDrop | Sopo Commerce |
FAQ
Promo King and SOPO Conversions: common questions
- Is Promo King or SOPO Conversions cheaper?
- Both list a free plan. Paid plans start at $9/month for Promo King and $24.99/month for SOPO Conversions. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- 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 Oct 13, 2026 for Promo King, Nov 9, 2026 for SOPO Conversions; 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 Oct 13, 2026 for Promo King, Nov 9, 2026 for SOPO Conversions. 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.