Margin Maker
Easy Profit Margin Calculator
Free · In-App Purchases · Designed for iPad
Rieki-chan – Profit Calculator for Sellers
Have you ever struggled to figure out the right price to charge in a flea market, a personal sale, or freelance work?
Worried about how shipping costs or platform fees affect your actual profit?
Rieki-chan is a simple, powerful tool that helps you calculate sales prices, profit amounts, and profit margins — all based on your desired outcome.
Just enter your basic costs (product price, shipping, fees), and you’re ready to go.
### 3 Smart Calculation Modes
**Calculate from Profit Margin**
Want to set a 20% margin on your cost price? It’s usually calculated like: Cost ÷ (100 - Margin) × 100…
But wait — do you include shipping and fees too? With Rieki-chan, just select the “From Margin” tab and input your desired percentage. The app calculates everything for you instantly.
**Calculate from Profit Amount**
Not interested in percentages? You just want a fixed 3,000 yen profit?
No problem. Choose the “From Profit” tab, enter your desired profit, and Rieki-chan instantly shows the ideal sales price.
**Calculate from Selling Price**
Have a fixed selling price in mind?
Select the “From Price” tab and enter your target. You’ll immediately see how much profit you’ll make and what the margin is.
### Compare and Adjust Freely
All three methods are just a tab away. Easily compare options and tweak numbers until they make sense.
You can clear all values with a single tap, and there’s even a smart feature to keep your fee settings when resetting.
### Disclaimer
Calculations may result in slight rounding errors. Please use results as a reference only.
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**Terms of Use:** https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
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Support for iOS 26
The developer, Masamichi Nakada, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Masamichi Nakada
- Size
- 3.8 MB
- Category
- Business
- Compatibility
Requires iOS 15.4 or later.
- iPhone
Requires iOS 15.4 or later. - iPad
Requires iPadOS 15.4 or later. - iPod touch
Requires iOS 15.4 or later. - Mac
Requires macOS 12.3 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- プレミアムプラン（広告非表示・月額） USD 0.99
- Copyright
- © 2022 Masamichi Nakada