About this app
Solve the mystery: "How much should I list this for?" This is a dedicated calculation tool designed to ensure you secure the exact "Take-home Profit" you want on marketplace apps. From platform fees and shipping to those often-overlooked "Packaging Costs"—by entering your specific expenses, you can prevent losses due to calculation errors and determine the perfect selling price every time. 【How to Use】It’s simple. Just enter these four items: ・Target Profit: The amount you want to keep. ・Fee Rate: The commission percentage of the platform. ・Shipping: The cost of postage/delivery. ・Packaging: Costs for boxes, mailers, or bubble wrap. The app instantly displays the "Required List Price" that covers all your costs. 【Perfect For...】 Preventing Losses: Avoid frustrating mistakes where you forget packaging or shipping costs and end up with little to no profit. ・Flexible Settings: Easily adjust for different platform fees (10%, 5%, etc.) and your own unique packaging expenses. ・Smart Price Negotiations: When a buyer asks for a discount, re-enter your costs to instantly see your "bottom line" price and make a quick decision. 【Key Features】 ・Calculate the required selling price based on your target profit. ・Manual input for fees, shipping, and packaging costs. ・Offline-friendly: No unnecessary data usage with a simple, fast interface. ・Calculation result saving ・Listing Management Take a few seconds before listing to secure your profit. Start selling with confidence today! Privacy Policy: https://mt-0509.github.io/Gyakusan-LandingPage/index_en.html Support: remonent59+GyakusanSupport@gmail.com
Latest release
What’s New
We’ve renewed the "Sold Items" list! Layout Improvements: Refined the design for better visibility and more intuitive navigation. Monthly History Support: You can now look back at your past sales history on a month-by-month basis. We hope this update helps you manage your daily profits even more effectively!
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 21, 2026 · 6:55 PM Free
Screenshots
