# Modulo Calculator, iCalcModulo — Calculate division remainders > Calculator app for division remainders, history, and clipboard functions. (iPhone/iPad app by Takao Ichimura.) - Source: https://appshunter.io/ios/app/modulo-calculator-icalcmodulo/id6443557633 (this page in markdown: same URL + `.md`) - Developer: [Takao Ichimura](https://appshunter.io/developer/1474061593) - Category: Utilities, Productivity - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 14 MB - Languages: English, Japanese - Released: 2022-10-02 - Data updated: 2026-07-05 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/modulo-calculator-icalcmodulo/id6443557633/reviews.md ## What is Modulo Calculator, iCalcModulo? iCalcModulo is a simple and easy-to-use calculator with a familiar operation system, plus a remainder calculation function (division with a "remainder"). It can be calculated by the same operation as real calculators. (Compliant with calculator of company C) It also has functions unique to the calculator app, such as displaying calculation history and calculation formulas. There is ⓘ button to display the information page that describes instructions. Thank you for using iCalc. (Instructions) The operation for Arithmetic Calculations, Root Calculations, Constant Calculation and Independent Memory Calculation are the same as real general calculators. (Compliant with calculator of company C) The original operations and functions are as follows. - When performing division by pressing [MOD] instead of [÷] to calculate, the quotient and remainder will be displayed. The remainder is calculated so that it is greater than or equal to 0. - For example, when calculating the quotient and remainder of 30 ÷ 7, if you operate [3] [0] [MOD] [7] [=], the calculation result '4-2', which means the quotient is 4 and the remainder is 2, is displayed on the result display. - For example in a dispensing work, a calculation when counting 3 tablets a day and 90 days with 14 tablets per sheet is [3] [×] [9] [0] [MOD] [1] [4] [=], the result '19-4', which means 19 sheets and 4 tablets, is displayed. - If the result of calculation with the [MOD] key is used for the next calculation, the value of the quotient will be used. - After calculation with the [=] key, the result is displayed on the main display and a white frame is added. - If you tap an operator key instead of [=] key to calculate, the operator turns white, indicating that you are preparing for the next calculation. - The calculation formula is displayed below the main display. - Flipping the main display while inputting, the minimum digit of the displayed input value will be erased one by one. - Flipping the MR display for independent memory to erase the value in independent memory. - Call the calculation history with [▼older] key. Repeat tapping to call older history. If you called a calculation history that was too old, you can use [▲newer] key to return to newer history. - Tapping [C] key to erase the entered value. And [C] key changes to [AC] key. - Tapping [MR] key to enter the value of the independent memory. And [MR] key changes to [MC] key. - [copy] and [paste] keys for clipboard. - Percent Calculations What is 25% of 100? [1] [00] [×] [2] [5] [%] → 50 25% of what number is 100? [1] [00] [÷] [2] [5] [%] → 400 What is 100 increased by 25%? 　 [1] [00] [+] [2] [5] [%] → 125 What is 100 decreased by 25%? 　 [1] [00] [−] [2] [5] [%] → 75 (Others) - The calculation range is −999,999,999,999 ~ 999,999,999,999. - The maximum number of digits is 12. - The developer assumes no responsibility for any loss or claims by third parties which may arise from the use of this app. ## Key features - Division remainder calculation - Calculation history - Formula display - Clipboard copy/paste - Percent calculations - Familiar calculator operation ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/modulo-calculator-icalcmodulo/id6443557633/reviews.md ### 3/5 — Japanese support only. How to remove ads? *2023-11-16* How to remove ads? How contact customer support if it is in Japanese only?? Can I stay in modulo mode and put in only the dividend without putting modulo diviser? **Developer response:** Thank you for the questions and for using the app. Please see my answers. - How to remove ads? -> Cannot be deleted - How contact customer support if it is in Japanese only?? -> I have no answer. - Can I stay in modulo mode and put in only the dividend without putting modulo diviser? -> Please try another app that is “Modulo Calculator”, https://apps.apple.com/app/modulo-calculator/id1514351751 ## Frequently asked questions about Modulo Calculator, iCalcModulo ### How do I calculate division remainders with Modulo Calculator? To calculate the quotient and remainder, press the [MOD] key instead of the [÷] key. For example, to find the remainder of 30 ÷ 7, operate [3][0][MOD][7][=]. The result will display as '4-2', indicating a quotient of 4 and a remainder of 2. ### Does Modulo Calculator have ads? Yes, Modulo Calculator contains advertisements. This allows the app to be offered for free to users. ### What devices is Modulo Calculator compatible with? Modulo Calculator is available for iPhone, iPad, and iPod. It is designed to run on iOS devices. ### What is the calculation range for Modulo Calculator? The calculation range for Modulo Calculator is from -999,999,999,999 to 999,999,999,999. The maximum number of digits that can be displayed is 12. ### Can I view my past calculations in Modulo Calculator? Yes, Modulo Calculator displays calculation history. You can access older history by tapping the [▼older] key and newer history with the [▲newer] key. ### How does Modulo Calculator handle percent calculations? Modulo Calculator supports various percent calculations, including finding a percentage of a number, determining what number a percentage is of, and calculating increases or decreases by a percentage. ### What is the age rating for Modulo Calculator? Modulo Calculator has an age rating of 4+. This indicates it is suitable for children aged 4 and older. ### How often is Modulo Calculator updated? Modulo Calculator was last updated on March 14, 2026, with version 2.0.1. This suggests regular updates are provided by the developer. ## Version history (last 5 releases) ### 2.1.0 — 2026-06-28 - Added a shortcut for copy & paste in keyboard-based environments. - Made minor improvements and enhanced performance. ### 2.0.1 — 2026-03-14 Made minor improvements and enhanced performance. ### 2.0.0 — 2026-03-01 Supported numeric formats that use a comma (,) as the decimal separator. The remainder calculation has been changed so that the remainder will not be negative. Made other improvements. ### 1.3.6 — 2025-10-22 Updated app information. ### 1.3.5 — 2025-03-31 Added Icons for Dark and Tinted modes. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-05.*