Calculator - Editable History
Edit History, Tax & Reference
Free · Designed for iPad. Not verified for macOS.
Calculator — Editable History, Tax & Reference.
A simple, powerful calculator with a memo-style editable history. Tap any past calculation to edit the formula or equation, name your result, and reference it in your next math problem. Includes one-tap tax buttons and a notebook-style history for everyday math.
No account registration, no subscription, free to use. Your calculation history is saved only on your device — never uploaded to our servers.
Features
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■ Editable History
Tap any past calculation in the history to edit the formula. Fix a typo, change a number, or update an equation — the result recalculates instantly. No other calculator lets you edit past math like this.
■ Named Results & Cross-Reference
Name any calculation result (e.g., "Rent", "Groceries", "Tax") and reference it in future formulas. Use the calculator as a math notebook for budgets, expenses, or any everyday math.
■ One-Tap Tax Buttons
Add or remove tax (consumption tax / sales tax) with a single tap. Customize the tax rate for your region. No more manual percentage math.
■ Full Calculation History
Every calculation is saved automatically in your history. Scroll back anytime to review past results, and tap any entry to edit it. Perfect for keeping track of a long series of calculations.
■ Customizable Themes & Fonts
Choose from multiple color themes and font sizes. Make the calculator easy to read for any age or visual preference.
■ Dark Mode Support
Automatically adapts to your system appearance. Comfortable for the eyes when doing math at night.
Recommended for
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■ Anyone tired of calculators with no editable history
■ People who need a memo-style calculator for budgets and expenses
■ Students who want to reference past results in new math problems
■ Anyone calculating tax or splitting a bill in everyday math
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Free, simple, and reliable. Download now to get the best editable history calculator with tax, formula reference, and named results.
Ratings & Reviews
The developer, Kouichi Yamaguchi, 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:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kouichi Yamaguchi
- Size
- 32.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 12 more
- English, French, Hindi, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 まるさんかくしかく