# Calc For Coders — Hex & Scientific Calculator > Decimal, hex, octal, binary conversion and scientific calculator with paper tape. (iPhone/iPad app by Richard Silverman.) - Source: https://appshunter.io/ios/app/calc-for-coders/id297096640 (this page in markdown: same URL + `.md`) - Developer: [Richard Silverman](https://appshunter.io/developer/297096643) - Category: Utilities, Business - Price: $1.99 - Rating: 4.60/5 from 11 App Store ratings · 38 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 3 MB - Languages: American English, French (France), German (Germany), Italian, Russian - Released: 2008-11-18 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/calc-for-coders/id297096640/reviews.md ## What is Calc For Coders? Paper Calc for Coders is a decimal, hex, octal & binary conversion calculator that includes 25 trigonometric functions. Other features include a full screen view of the paper tape, two color schemes, 250 lines of EMAILable paper tape history, a re-sizable keyboard and more. Paper Calc Coder Specifications: ================ Please see the FAQ for left/right handed use of the base-conversion key. ► 250 line paper tape history . - PRINT (requires iOS4.2 & an AirPrint printer) . - EMAIL . - add comments . - timestamp ► Animated base 16, 8,and 2 keyboards for math, logical and shift operators (see FAQ below) ► Full-screen view of the paper tape (right-side scroll page) ► Two color schemes ► Grab a number on any line and bring it into the current calculation (better than RPN) ► Slide the numeric LCD to resize the keyboard ► Very fast powerOn - no waiting ► Create and save custom keyboards ► Three different display formats: . - floating point . - engineering (power to multiple of 3) . - fixed point (2 to 8 places) ► 10 individual memories with color indicators ► International number formatting (Settings -> General -> International -> Region Format -> select region) ► 25 scientific keys include all standard trig and hyperbolic functions, gamma (x!), y^x, x^2, sqrt, y^(1/x), 10^x, e^x, log, ln, logy/logx, e, pi, and random number. Trigonometric domains include both radians and degrees, or, convert between them. ================ FAQ: Q1. How do I create my own custom keyboards? A1. Touch the keyboard icon to go into Keyboard Edit Mode. Touch keys to make it any one of three different key sizes (space must be available to the right for a double-size key). Hold and move a key to reposition it. Hit the left wall with a key to blast it through to the Trig keyboard. Press "Cust 1,2,3" to Save. Press Again to Rename the button. Touch the left-side black box to exit Keyboard Edit Mode. Q2. How do I use the Base Conversion key? A2. Follow these guidelines: ► Tap the base conversion key to rotate among Decimal, Hex, Octal, & Binary keyboards, or, hold down on the key to select from a menu of the four. ► Right-handers should hold down on the right side of the base conversion key. Left-handers on the left. The menu will pop up on the left or right side appropriately. ► Select the 'D2' (Default 2) keyboard if you do not want the base conversion key on your main keyboard. Q3. How do I use the % key? A3. There are two ways to use the % key: ► 1st: Obtain the % of number: Press '200 % 5 ='. Answer will be '10'. PaperCalc took 5% of 200. ► 2nd: The % of a number is used in the operation on the number: Press: '200 - 5 % ='. Answer will be '190'. PaperCalc subtracted 5% of 200 from 200. Q4. How do I access and use the 10 memory locations? A4. Press the 'mem' button first. Then select one of the yellow keys (clear, store, recall, add, sub). Finally, press the memory location (0-9 buttons) to operate on. =============================== TERMS AND CONDITIONS Your use of this application is governed by Interlocken Technology's Terms of Use (http://InterlockenTechnology.com/InterlockenPrivacyPolicy/InterlockenTechnologyTermsOfUse.pdf) and Privacy Policy (http://InterlockenTechnology.com/InterlockenPrivacyPolicy/Interlocken Technology Privacy Policy.pdf) ## Key features - Decimal, Hex, Octal, Binary conversion - 25 scientific and trigonometric functions - 250-line printable and emailable paper tape history - Customizable and resizable keyboard - Multiple display formats (floating, engineering, fixed) - 10 memory locations with color indicators ## Recent user reviews (10 of 38) All indexed reviews: https://appshunter.io/ios/app/calc-for-coders/id297096640/reviews.md ### 5/5 — Great calculator! *2020-06-30, version 5.01.00* Tried several calcs and like this one the best! Just wish it let you put a note line in the “tape” so you can reference it later. ### 5/5 — Please update to IOS 11.0 *2017-10-03, version 3.80.00* Would really like to be able to use app. A favorite. ### 5/5 — Great TapeCalc *2017-08-02, version 3.80.00* I get the message about needing update for iOS 11. Is the a plan to update it? Would be a shame to have to lose this one. ### 1/5 — iOS warning *2017-07-30, version 3.80.00* App does not appear to be maintained. Bummer! ### 5/5 — Useful app *2016-07-11, version 3.80.00* Love the the paper tape -- comes in handy when looking back entries. Clear, easy to use. What more can you ask? ### 5/5 — Useful for Programmers *2016-05-11, version 3.80.00* I use the hexadecimal features quite a bit when debugging software written in assembler or machine code. The calculator "tape" let's me scroll back through previous calculations, and copy ("grab") terms to use in new calculations. ### 5/5 — Great calculator *2015-01-09, version 3.80.00* Love this app! I use it everyday! ### 5/5 — Great calculator *2014-09-21, version 3.7* It is really nice to be see the history on the lapsed tape. I've used this calculator for many years. ### 1/5 — QUIT BUGGING ME FOR REVIEWS! *2014-01-13, version 3.7* Works fine, except for memory, which is probably uninformed user error. However, one star for annoying me with a prompt to review the app. ### 5/5 — Works great *2013-12-18, version 3.51* Easy to use and since it keeps a good history I don't lose everything if I hit the wrong key! ## Frequently asked questions about Calc For Coders ### What types of number bases does this calculator support? This calculator supports decimal, hexadecimal, octal, and binary number bases. You can easily switch between these bases using the dedicated base conversion key. Holding down the key allows you to select a specific base from a menu. ### What scientific functions are included? The app includes 25 scientific keys, covering standard trigonometric functions (in both radians and degrees), hyperbolic functions, factorials (x!), powers (y^x), square roots, logarithms, and more. You can also convert between trigonometric domains. ### How can I save or share my calculations? The app features a 250-line paper tape history that can be printed (requires iOS 4.2 and an AirPrint printer) or emailed. You can also add comments and timestamps to your paper tape entries. ### Can I customize the keyboard layout? Yes, you can create and save custom keyboards. In Keyboard Edit Mode, you can resize keys, reposition them, and even blast them to the Trig keyboard. You can save up to three custom keyboard configurations. ### What are the different display formats available? The calculator offers three display formats: floating point, engineering (for powers in multiples of 3), and fixed point (allowing 2 to 8 decimal places). You can also adjust the numeric LCD to resize the keyboard. ## Version history (last 5 releases) ### 5.20.04 — 2021-03-04 Version 5.20.04: . Name changed to Calc For Coder version 5.20.02: . full support for iOS 12 and higher ### 5.20.02 — 2021-01-17 . full support for iOS 12 and higher ### 5.01.00 — 2017-11-01 1. New keyboard artwork. 2. Second, default, keyboard now places all base conversion and trig functions on the main keyboard. To use this keyboard, touch the keyboard icon, then select '1Kybd' from the choices offered. Or make your own keyboard layout and save as 'Cust 1, 2, or 3'. 3. Improved HELP text 4. Default color now set to 'Light'. Select the 'Dark' option, if desired, on right-side scrollview. ### 4.01.00 — 2017-10-07 Updated for iOS10 & 11. ### 3.80.00 — 2014-10-29 1. Repaired degree (o) and radian (rad) symbols on paper tape 2. The 'Grab Number' menu has been improved. Insertion of a number into your calculation is easier than ever. ## Apps similar to Calc For Coders | App | Rating | Price | Category | | --- | --- | --- | --- | | [Timer for Rehearsal: Fin](https://appshunter.io/ios/app/timer-for-rehearsal-fin/id726213320) | 4.6 (132) | Free | Utilities | | [Pepi](https://appshunter.io/ios/app/pepi/id1283082051) | 3.5 (46) | $1.99 | Utilities | | [StudioXm](https://appshunter.io/ios/app/studioxm/id1145413743) | 3.3 (4) | Free | Utilities | | [Julianator](https://appshunter.io/ios/app/julianator/id383950353) | 4.6 (48) | $0.99 | Utilities | | [RF Calculators - everything RF](https://appshunter.io/ios/app/rf-calculators-everything-rf/id1559692740) | 3.0 (1) | Free | Utilities | | [Modulo Calculator](https://appshunter.io/ios/app/modulo-calculator/id1514351751) | — | Free | Utilities | ## More apps by Richard Silverman - [Calc For Coders Lite](https://appshunter.io/ios/app/calc-for-coders-lite/id306579427) - [Paper Calc Office](https://appshunter.io/ios/app/paper-calc-office/id328576488) - [Paper Calc Office Lite](https://appshunter.io/ios/app/paper-calc-office-lite/id347713516) - [Accountant Calculator](https://appshunter.io/ios/app/accountant-calculator/id374945395) - [Adding Machine 10Key iPhone](https://appshunter.io/ios/app/adding-machine-10key-iphone/id392883834) All apps by Richard Silverman: https://appshunter.io/developer/297096643 --- *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 2026-06-10.*