FP1 ‑ Cart Shipping Calculator vs Shipping‑Shock Preventer
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 14, 2026 for FP1, Oct 13, 2026 for Shipping‑Shock Preventer.
The short answer
- Both list a free plan. Paid plans start at $4.99/month for FP1 and $9/month for Shipping‑Shock Preventer.
- FP1 lists 4 features Shipping‑Shock Preventer’s listing doesn’t mention, including Flat fee, Multi-zone, Weight-based.
Head to head
Free
- · 40 shipping calculations included
- · No time limit on free usage
- · Uses existing Shopify shipping rates
Unlimited
- · Country and destination estimates
- · Unlimited shipping calculations
- · Uses existing Shopify shipping rates
Free
- · 200 shipping estimates/month
- · All core shipping estimate features
- · Cart-aware shipping estimates
- · Customer location detection
- · Estimated shipping costs before checkout
Starter
- · 5,000 shipping estimates/month
- · Cart-aware shipping estimates
- · Customer location detection
- · Customizable estimate display
- · Everything in Free
Growth
- · 25,000 shipping estimates/month
- · Built for growing stores
- · Cart-aware shipping estimates
- · Customizable estimate display
- · Everything in Starter
Scale
- · 100,000 shipping estimates/month
- · Built for high-volume stores
- · Cart-aware shipping estimates
- · Customizable estimate display
- · Everything in Growth
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureFP1 - Cart Shipping Calculator lets shoppers preview estimated shipping rates in the cart using your existing Shopify settings. Shoppers can enter a destination and postcode, postal code, or ZIP code before checkout to see available shipping estimates earlier. The app can also suggest the shopper’s country or region automatically. Final shipping rates are confirmed at checkout.
Shipping-Shock Preventer helps merchants show estimated shipping costs directly on product pages before checkout. The widget can use the shopper's destination, current cart, selected product, and Shopify's available delivery rates to provide a clearer shipping estimate. Merchants can configure display, destination, messaging, and estimation behavior from the app and Shopify Theme Editor.
- Show in-cart shipping estimates using your existing shipping zones.
- Optional Geo-IP can preselect country for faster in-cart shipping estimates.
- Pick country and province/state (if needed). Enter Postal/ZIP to refresh rates.
- Uses your configured rates, including carrier-calculated rates when available.
- Show estimated shipping costs before checkout
- Use current cart items for more relevant shipping estimates
- Detect shopper destination with Geo-IP
- Support country, state or province, and postal code selection
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 |  FP1 |  Shipping‑Shock Preventer |
|---|---|---|
| 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 | FP1 | Shipping‑Shock Preventer |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | 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 | FP1 | Shipping‑Shock Preventer |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $4.99/month(ahead) | $9/month |
| Longest free trial | Not listed | Not listed |
| Plans listed | 2 | 4 |
Listing
| Measure | FP1 | Shipping‑Shock Preventer |
|---|---|---|
| Shopify category rank | #185(ahead) | #521 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Dec 31, 2025 | Sep 8, 2026 |
| Languages | 1 | 1 |
| Developer | Fixpoint One | GolamAzam |
FAQ
FP1 and Shipping‑Shock Preventer: common questions
- Is FP1 or Shipping‑Shock Preventer cheaper?
- Both list a free plan. Paid plans start at $4.99/month for FP1 and $9/month for Shipping‑Shock Preventer. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- FP1 lists 4 the others don’t mention, such as Flat fee, Multi-zone, Weight-based, ZIP/post code. Shipping‑Shock Preventer lists 1 the others don’t mention, such as Customer-based. 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 Oct 14, 2026 for FP1, Oct 13, 2026 for Shipping‑Shock Preventer; 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 14, 2026 for FP1, Oct 13, 2026 for Shipping‑Shock Preventer. 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.