送料計算/利益計算アプリ MerCalc

This free app is for users of flea market apps, auctions, reselling, and online retail. It allows you to find the cheapest shipping method from 66 services offered by 11 companies, including Mercari, Rakuma, Yahoo! Auctions, PayPay Flea Market, Mobao!, minne, Japan Post, Yamato Transport (Kuroneko Yamato), Sagawa Express, Eco-hai, and Ecomoo-bin (updated October 1, 2026).

■Features
　・Find the cheapest shipping method for your package.
　・Further reduce shipping costs with the size down suggestion function.
　・Calculate profit/profit margin from sales price, fees (automatically calculated), shipping costs, and cost price, allowing you to set a sales price that won't result in a loss (you can also calculate the sales price from the profit/profit margin. Automatically calculates the differences in fees and shipping costs for Mercari, Rakuma, Yahoo! Auctions, and PayPay Flea Market).
　・Measure dimensions anytime, anywhere using your smartphone with the ruler function.
　・Entered package dimensions, weight, etc. are saved in the history. Because it keeps a record, you can calculate shipping costs retroactively.
• It supports major delivery services (Yamato Transport (Kuroneko Yamato)/Japan Post (Post Office)/Sagawa Express), so you can check at any time whether your package arrived safely.
• It also supports cash-on-delivery services, and you can calculate shipping costs including fees.
• You can easily input dimensions by specifying major envelopes and cardboard boxes.
• You can share the shipping cost calculation results with friends via email or social media.

■ Websites that introduce MerCalc's features and operation methods:
- Appliv: https://android.app-liv.jp/004261798/
- All About: https://allabout.co.jp/gm/gc/476479/
- Subora Setsuyaku Shufu.COM: https://zuborasyuhu.com/mercari/
In addition, it has been introduced by many flea market app, auction, reselling professionals, IT engineers, and app review sites.

https://mercalc.blogspot.com/search/label/app-rating

■Supported Delivery Services
□Mercari
- Rakuraku Mercari Delivery Nekopos
- Rakuraku Mercari Delivery Takkyubin Compact (Slim/Box Type)
- Rakuraku Mercari Delivery Takkyubin
- YuYu Mercari Delivery Yu-Packet
- ​​YuYu Mercari Delivery Yu-Packet Post (Mini/Seal/Box Type)
- YuYu Mercari Delivery Yu-Packet Plus
- YuYu Mercari Delivery Yu-Pack
- Packing & Shipping Tanomeru Delivery
□Rakuma
- Kantan Rakuma Pack Nekopos
- Kantan Rakuma Pack Takkyubin Compact (Slim/Box Type)
- Kantan Rakuma Pack Takkyubin
- Kantan Rakuma Pack Yu-Packet
- ​​Kantan Rakuma Pack Yu-Packet Post (Mini/Seal/Box Type)
- Kantan Rakuma Pack Yu-Packet Plus
- Easy Rakuma Pack Yu-Pack
□Yahoo! Auctions/Yahoo! Flea Market
- ​​Easy Delivery Nekopos (Seller pays/Buyer pays)
- Easy Delivery Takkyubin Compact (Slim/Box type) (Seller pays/Buyer pays)
- Easy Delivery Takkyubin (Seller pays/Buyer pays)
- Leave it to us Delivery
- Easy Delivery Yu-Packet (Seller pays/Buyer pays)
- Easy Delivery Yu-Packet Post (mini/Seal/Box type) (Seller pays/Buyer pays)
- Easy Delivery Yu-Packet Plus (Seller pays/Buyer pays)
- Easy Delivery Yu-Pack (Seller pays/Buyer pays)
□Mobao!
- Mobao! Easy Fixed-Rate Delivery Yu-Packet
- ​​Mobao! Easy Fixed-Rate Yu-Pack
□minne
　- Easy Minneko Pack Nekopos
　- Easy Minneko Pack Takkyubin Compact (Slim/Box Type)
　- Easy Minneko Pack Takkyubin
□Japan Post
　- Mini Letter (Postal Letter)
　- Standard Mail
　- Non-Standard Mail (Standard Size/Non-Standard Size)
　- Smart Letter
　- Letter Pack Light
　- Letter Pack Plus
　- Click Post (Updated October 1, 2026)
　- Yu-Mail (Standard Size)
　- Yu-Packet (Updated October 1, 2026)
　- Yu-Pack (Updated October 1, 2026)
　- Heavyweight Yu-Pack (Updated October 1, 2026)
□Yamato Transport
　- Kuroneko Yamato Takkyubin
　- Kuroneko Yamato Takkyubin Compact (Slim/Box Type)
□ Sagawa Express
　- Hikyaku Takkyubin
□ Eco-hai
　- Eco-hai (Nationwide)
□ Ecomoo-bin
　- Ecomoo-bin

■ Notes on Use/Disclaimer
・We take the utmost care to ensure the accuracy of shipping cost calculations, but please contact us if you find any errors.
・Please note that the provider (Yas) assumes no responsibility for any damages incurred as a result of using this application.

■ Latest Information
Blogger: https://mercalc.blogspot.com/
Facebook: https://www.facebook.com/YasDevAcc/
Twitter: https://twitter.com/YasDevAcc
LINE: https://lin.ee/qlw0327

■Update History
https://mercalc.blogspot.com/search/label/%E3%83%AA%E3%83%AA%E3%83%BC%E3%82%B9%E6%83%85%E5%A0%B1
https://mercalc.blogspot.com/search/label/release-information