# CalculationBook Pro > Advanced calculator with formula display, history, and sheet management. (iPhone/iPad app by SHIBUYA Masanori.) - Source: https://appshunter.io/ios/app/calculationbook-pro/id875152413 (this page in markdown: same URL + `.md`) - Developer: [SHIBUYA Masanori](https://appshunter.io/developer/339986228) - Category: Utilities - Price: Free - Rating: 4.51/5 from 3,435 App Store ratings - Age rating: 4+ - Requires: iOS 13.0 · 3 MB - Languages: English, Japanese - Released: 2014-05-28 - Data updated: 2026-09-03 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/calculationbook-pro/id875152413/reviews.md ## What is CalculationBook Pro? CalculationBook Pro is an incredibly easy-to-use calculator. Mathematical formulas are displayed, so you don't have to worry about making a mistake when entering numbers. Equipped with original features, including a history for easy editing and recalculation, a totalization bar, formula references, and sheet management function, it's simple to use. CalculationBook can be used easily without any fuss, just like a regular calculator. ◆Go back and check past calculations ・Scroll through the list of calculations to hide the keyboard. ・Correct past calculations and recalculate. ・Swipe past calculations to copy or delete them. ◆Refer to calculation results ・To refer to other calculation results while calculating, tap the solution section of the calculation which you wish to refer. ・When you correct a formula, calculations referring to it will also be linked and updated. ・Formulas can be given names. When you name formulas that are referred to, it becomes easy to understand connections with references. ◆Use parentheses and a variety of functions ・To use the scientific calculator function, change the keyboard by tapping the second button from the left on the keyboard's top row. ・You can also change to it by swiping left on the keyboard. ◆Summarize bar ・Convenient for summing up many items, such as shopping receipt amounts. ・Summarize total, total (tax included), average, maximum, minimum, number of items, variance, standard deviation, unbiased variance and unbiased standard deviation. ・Show or hide the summarize bar by tapping the third button from the left on the top row of the keyboard. ◆Function buttons ・Freely assign frequently-used buttons to be the three function buttons. ・When you swipe down on the keyboard, the three function buttons appear. ・√, % and TAX are initially assigned, but you can freely assign functions by going to Settings>Details. ・When function buttons are displayed, a parentheses button will appear at the top right. ◆Sheet manager function ・Start calculating on a new sheet with your calculation history left as-is. ・Create multiple sheets depending on your intended use. ◆Try the free version. ・The free version includes advertisements. ・It does not include the sheet manager function. ◆ Disclaimer Although we are making every effort to ensure the accuracy of the calculation results done by this App, we do not guarantee its accuracy. Please understand that we are not liable for any damage, loss, disadvantage, etc. caused in using this App. ## Key features - Formula display for accuracy - Editable calculation history - Sheet management for multiple calculations - Summarize bar for totals and statistics - Customizable function buttons - Scientific calculator functions ## Frequently asked questions about CalculationBook Pro ### What is CalculationBook Pro? CalculationBook Pro is a user-friendly calculator app that displays mathematical formulas as you enter them, helping to prevent errors. It offers features like calculation history, sheet management, and a summarize bar for efficient calculations. ### How does CalculationBook Pro help prevent calculation errors? The app displays mathematical formulas as they are entered, allowing users to visually verify their input before calculation. This feature helps catch mistakes early, ensuring greater accuracy. ### Can I edit past calculations in CalculationBook Pro? Yes, CalculationBook Pro features an editable history. You can scroll through past calculations, correct them, and recalculate without starting over. Swiping past calculations allows for easy copying or deletion. ### What is the sheet manager function in CalculationBook Pro? The sheet manager function allows you to create and manage multiple calculation sheets. This is useful for organizing different types of calculations or projects, keeping your calculation history intact for each sheet. ### Does CalculationBook Pro have ads? The provided data indicates that the free version of CalculationBook Pro includes advertisements. The paid version, or potentially a separate ad-free version, would not contain ads. ### What kind of statistics can the summarize bar show? The summarize bar in CalculationBook Pro can display various statistics such as total, total with tax, average, maximum, minimum, count, variance, and standard deviation for a list of items. ### How often is CalculationBook Pro updated? The latest version of CalculationBook Pro is 1.19, which was last updated on September 11, 2021. This suggests updates are not extremely frequent but the app is maintained. ### What devices is CalculationBook Pro available on? While specific device compatibility isn't detailed, CalculationBook Pro is a mobile application, typically designed for smartphones and tablets running iOS or Android operating systems. ## Version history (last 1 release) ### 1.19 — 2021-09-11 - ナビゲーションバー再表示ボタンの位置を修正しました。 - iOS 13以降が必要です。 ## More apps by SHIBUYA Masanori - [ExpenseBook](https://appshunter.io/ios/app/expensebook/id339986225) - [CalendarBook Pro](https://appshunter.io/ios/app/calendarbook-pro/id715765163) - [CalculationBook](https://appshunter.io/ios/app/calculationbook/id874401572) - [CalendarBook](https://appshunter.io/ios/app/calendarbook/id919892359) All apps by SHIBUYA Masanori: https://appshunter.io/developer/339986228 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*