Shiplines
iOS app by Shadowfetch · App Store ID 6777256265 · iOS
Shipline is a fast offline shipping rate comparer for solo sellers. Enter a parcel - weight, dimensions, from-ZIP, to-ZIP - and instantly see what USPS, UPS, and FedEx will charge for the same shipment. No accounts, no scraping, no login.
Designed for Etsy, eBay, Mercari, Poshmark, and Depop sellers who pack their own packages and want a per-shipment answer in under five seconds, not a quote workflow.
What Shipline Compares
- USPS Priority Mail
- USPS Ground Advantage
- UPS Ground
- FedEx Ground
Each Result Shows
- The price for that carrier, ranked cheapest first
- Dollars saved by the cheapest option vs the next-best option
- Estimated delivery window (business days)
- The zone the calculation used
- Whether dimensional weight beat the actual weight
How Shipline Works
- 3-digit ZIP prefix centroids and distance bands map the route to a USPS-style zone 1-9
- Per-carrier dim divisors (USPS 166, UPS 139, FedEx 139) apply when box volume wins
- USPS Priority and Ground Advantage bill in ounces under a pound; UPS and FedEx Ground round up to the next whole pound
- All four pricings happen on this device against a baked-in 2026 reference table - no network call
What'S Included
Get it. Shiplines is on the
App Store for iPhone and iPad.
Privacy and support
Privacy information for Shiplines · Support for Shiplines
Questions: shadowfetchapps@gmail.com
Shiplines · App Store ID 6777256265 · Published by Shadowfetch · shadowfetch.com