Fits In The Box vs ShipKit: Custom Shipping Rates
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 Fits In The Box, Oct 14, 2026 for ShipKit.
The short answer
- Only ShipKit lists a free plan. Paid plans start at $9/month for Fits In The Box and $8.99/month for ShipKit.
- ShipKit lists 6 features Fits In The Box’s listing doesn’t mention, including Customer-based, Flat fee, Order limits.
Head to head
Starter
- · Basic product recommendations
- · Cart shipping estimate widget
- · Email support (48hr response)
- · Real-time 3D bin packing engine
- · Up to 100 synced products
- · Up to 5 box configurations
Pro
- · Analytics dashboard with insights
- · Cold chain and special handling
- · Custom packing rules and constraints
- · Multi-box packing for large orders
- · Priority email support (24hr)
- · Smart recommendations by fit + margin
FREE DEV STORE
- · All features available
- · Free for dev stores
- · Free for sandbox stores
- · Partner friendly app
Premium Plan
- · Create Zip Code based shipping rates
- · Create percentage based shipping rates
- · Create product cost based shipping rates
- · Create shipping rates by cart total
- · Create shipping rates by items quantity
- · Create tier based shipping rates
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureFits In The Box uses a 3D packing engine to show customers exactly what else fits in their current shipment. It helps merchants build bigger orders by giving shoppers a reason to add one more item. The app installs in minutes, works with your existing products and shipping rates, and handles complex scenarios like multi-box orders and cold chain requirements automatically.
ShipKit lets you fully customize and automate Shopify shipping rates with ease in the checkout. Using intuitive Flows interface, you can create multiple flexible rules based on quantity, ZIP/postcodes, or combinations and many more. Reduce errors, save time, and provide precise shipping prices. Gain full control, streamline operations, and optimize your shipping strategy effortlessly.
- Real-time 3D packing calculates remaining box space as shoppers browse
- Smart upsell suggestions highlight products that ship with no added weight
- Works out of the box—just enter your box sizes and shipping rates
- Multi-box logic splits large orders across boxes for accurate shipping
- Create / customize shipping rates in the checkout
- Easy Flow interface to create simple or complex workflows
- Dynamic shipping rates with single or multiple rules
- Multichannel support: in-app chat, website resources and social media engagement
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 |  Fits In The Box |  ShipKit |
|---|---|---|
| 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 | Fits In The Box | ShipKit |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 2 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Fits In The Box | ShipKit |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $9/month | $8.99/month(ahead) |
| Longest free trial | 14 days | 7 days |
| Plans listed | 2 | 2 |
Listing
| Measure | Fits In The Box | ShipKit |
|---|---|---|
| Shopify category rank | #458 | #143(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Mar 13, 2026 | Nov 21, 2025 |
| Languages | 1 | 1 |
| Developer | Swagstack | Nextools |
FAQ
Fits In The Box and ShipKit: common questions
- Is Fits In The Box or ShipKit cheaper?
- Only ShipKit lists a free plan. Paid plans start at $9/month for Fits In The Box and $8.99/month for ShipKit. 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?
- ShipKit lists 6 the others don’t mention, such as Customer-based, Flat fee, Order limits, Quantity-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 13, 2026 for Fits In The Box, Oct 14, 2026 for ShipKit; 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 Fits In The Box, Oct 14, 2026 for ShipKit. 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.