PromiseCheck: Cart Monitoring vs Revenue Guardian
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 28, 2026 for PromiseCheck, Nov 10, 2026 for Revenue Guardian.
The short answer
- Paid plans start at $79.99/month for PromiseCheck and $19/month for Revenue Guardian.
- PromiseCheck and Revenue Guardian list the same 3 features.
Head to head
Standard Plan
- · Add to Cart, options & cart quantities
- · Draft-theme cart & widget comparisons
- · Email, Slack and optional AI guidance
- · Hourly cart checks & daily reviews
- · Product images, prices & widgets
- · Screenshots, history and rechecks
Starter
- · Payment mix and JavaScript signals
- · Revenue anomaly monitoring
- · Synthetic storefront journey checks
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureTheme changes can leave Add to Cart or cart quantities broken. PromiseCheck tests supported product-to-cart flows on desktop and mobile. Schedule hourly cart checks and daily reviews. Compare draft-theme cart and delivery-widget checks with a saved live scan before publishing. Get email alerts, review screenshot evidence and recheck fixes.
Revenue Guardian helps you investigate unexpected sales changes. Monitor paid-order trends against your store’s history, review payment-method shifts, and check product, cart, and checkout-entry journeys without placing orders. Prioritized incidents bring evidence together so you can decide what to investigate next. Store access is read-only.
- Discover store promises; compare shipping estimates and return wording
- Test Add to Cart, variants, quantities and cart prices on desktop and mobile
- Compare draft-theme cart and delivery-widget checks before publishing
- See before-and-after evidence, change history and clear steps to fix issues
- Detect unusual revenue changes using store-specific baselines
- Test product, cart, and checkout-entry journeys without placing orders
- Track payment-method shifts and storefront JavaScript failures
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 |  PromiseCheck | |
|---|---|---|
| Detected stores | Not published | Not published |
| 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 | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | PromiseCheck | |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 1 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | PromiseCheck | |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $79.99/month | $19/month(ahead) |
| Longest free trial | 14 days | 7 days |
| Plans listed | 1 | 1 |
Listing
| Measure | PromiseCheck | |
|---|---|---|
| Shopify category rank | #465 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Oct 6, 2026 | Nov 10, 2026 |
| Languages | 1 | 4 |
| Developer | Shop Promise | Novelle Labs |
FAQ
PromiseCheck and Revenue Guardian: common questions
- Is PromiseCheck or Revenue Guardian cheaper?
- Paid plans start at $79.99/month for PromiseCheck and $19/month for Revenue Guardian. 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 28, 2026 for PromiseCheck, Nov 10, 2026 for Revenue Guardian; 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 28, 2026 for PromiseCheck, Nov 10, 2026 for Revenue Guardian. 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.