---
title: "PackOS Checkout Shopify App Profile"
description: "PackOS solves the problem of inaccurate shipping rates at checkout. When box size is estimated incorrectly, merchants either overcharge customers and lose carts, or undercharge and lose margin. PackOS uses bin-packing logic to determine which box an order actually fits in, then queries live rates from USPS, UPS, FedEx, and other carriers for that specific package. Merchants configure their box inventory once, set their carrier preferences, and PackOS handles the rest automatically at checkout."
canonical_url: "https://shoplist.co/shopify-apps/packos-pack"
markdown_url: "https://shoplist.co/shopify-apps/packos-pack.md"
last_updated: "2026-10-13"
entity_type: "shopify_app"
slug: "packos-pack"
source: "public Shopify app profile allowlist"
---

# PackOS Checkout Shopify App Profile

> PackOS solves the problem of inaccurate shipping rates at checkout. When box size is estimated incorrectly, merchants either overcharge customers and lose carts, or undercharge and lose margin. PackOS uses bin-packing logic to determine which box an order actually fits in, then queries live rates from USPS, UPS, FedEx, and other carriers for that specific package. Merchants configure their box inventory once, set their carrier preferences, and PackOS handles the rest automatically at checkout.

## Quick answer
PackOS Checkout has 0 detected stores in Shoplist. This Markdown profile displays 0 public brand examples; it is not a complete customer list.

## Key facts
- Name: PackOS Checkout
- Monitoring status: First-adopter watch
- Developer: PackOS
- Developer profile: https://shoplist.co/app-developers/packos
- Shopify App Store URL: https://apps.shopify.com/packos-pack
- Website: https://www.packospro.com
- Launch date: May 20, 2026
- Shoplist category: Shipping & Fulfillment
- Rating: 5
- Review count: 1
- Free trial signal: Yes

## Pricing summary
Starter: $50/month; Basic: $105/month; Growth: $199/month; Pro: $399/month

Shoplist has not yet found reliable public storefront evidence connecting a Shopify store to this app. This does not mean the app has no users. Some apps are new, admin-only, server-side, theme-independent, or otherwise difficult to detect from public storefront signals.


## App Signals
As of November 8, 2026:

- Stores running it: 0, 0.0% of the stores Shoplist tracks
- Store movement, last 28 days: +0 new stores, +0 returning, −0 removed, net 0 (estimated; 1 day held out of movement)
- Primary App Store category: Shipping rates, #391 (14-day median position)
- Listing reviews: 1

## Public callouts
- Bin-packing engine selects the recommended box for each order automatically
- Live carrier rates from USPS, UPS, and FedEx returned at checkout
- Configurable box inventory, carrier settings, and shipping rules
## Shopify App Store categories
- Shipping rates

## Data note
Profile updated: October 13, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-11-08 23:07:43.549653\+00
Detection metrics refreshed: 2026-11-08 10:00:00.19319\+00
Public app evidence date: 2026-10-13 21:45:20.085389\+00
This generated Markdown profile intentionally exposes only public, stable app-profile fields and a small public app-stack sample from Shoplist. It excludes private contact data, people data, internal scores, crawl provenance, full datasets, and unstable operational fields.

## Related links
- [HTML app profile](https://shoplist.co/shopify-apps/packos-pack)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)