Coverage Calc: Box Calculator vs Plomly
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 4, 2026 for Coverage Calc, Oct 14, 2026 for Plomly.
The short answer
- Both list a free plan. Paid plans start at $4.99/month for Coverage Calc and $14.99/month for Plomly.
Head to head
Free
- · Area, volume, length and paint
- · Calculator on 5 products
Starter
- · Calculator on 25 products
- · Everything in Free
Pro
- · Everything in Free
- · Unlimited products
Free
- · AI wizard scans (2 per month)
- · Measurement calculator on product pages
- · Metric and imperial units
- · Up to 150 products configured
- · Up to 5000 calculations per month
Pro
- · AI chat: up to 500 conversations/month
- · Direct founder support by email
- · Everything in Free
- · Project planner (auto-bundle add-ons)
- · Unlimited AI wizard scans
- · Unlimited products and calculations
Premium
- · 4× AI chat: up to 2,000 conversations
- · Everything in Pro
- · Priority position in support queue
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCoverage Calc adds a calculator to product pages for items sold by coverage, such as tile, flooring, paint, turf and soil. Shoppers type their room dimensions, the calculator adds your waste percentage, converts the total into your sales unit and rounds up. It shows the estimated cost and adds the exact quantity to the cart in one click.
Plomly is the only Shopify app that combines a measurement calculator with an AI shopping assistant — built for stores selling tile, paint, flooring, wallpaper, concrete, fence, and materials sold by m² or ft². Customers describe their project — "I'm tiling a 5m² bathroom" — and Plomly reads YOUR catalog, recommends the right products with quantities, and builds the cart in one click. Most calculators are generic.
- Turn room dimensions into boxes, cans, bags or rolls with waste included
- Add the exact quantity to cart in one click, with the estimated cost shown
- Set up a whole collection at once; meters or feet, English or Spanish
- Calculator widget on product pages for area, volume, linear, or unit math
- AI chat answers customer questions about quantity in natural language
- Project planner suggests complementary products based on the primary item
- AI wizard reads the catalog and proposes a configuration per variant
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 |  Plomly | |
|---|---|---|
| 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 | Plomly | |
|---|---|---|
| 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 | Plomly | |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $4.99/month(ahead) | $14.99/month |
| Longest free trial | 14 days | 14 days |
| Plans listed | 3 | 3 |
Listing
| Measure | Plomly | |
|---|---|---|
| Shopify category rank | Not enough data | #86 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Nov 4, 2026 | May 28, 2026 |
| Languages | 1 | 2 |
| Developer | kronuzzs | Nelesis development |
FAQ
Coverage Calc and Plomly: common questions
- Is Coverage Calc or Plomly cheaper?
- Both list a free plan. Paid plans start at $4.99/month for Coverage Calc and $14.99/month for Plomly. 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 Nov 4, 2026 for Coverage Calc, Oct 14, 2026 for Plomly; 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 4, 2026 for Coverage Calc, Oct 14, 2026 for Plomly. 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.