# Scientific Calculator DES-38D — Scientific & Logical Functions > Advanced scientific calculator with multi-line display, statistical analysis, and graphing. (iPhone/iPad app by Dohmann Engineering Services.) - Source: https://appshunter.io/ios/app/scientific-calculator-des-38d/id1379779839 (this page in markdown: same URL + `.md`) - Developer: [Dohmann Engineering Services](https://appshunter.io/developer/401682475) - Category: Utilities, Productivity - Price: $5.99 - Rating: 4.30/5 from 3 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 9 MB - Languages: American English - Released: 2018-05-27 - Data updated: 2026-08-18 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/scientific-calculator-des-38d/id1379779839/reviews.md ## What is Scientific Calculator DES? The DES-38D is an easy-to-use, multi-line Scientific Calculator with intuitive, left-to-right data entry & display. It was designed and developed by a professional engineer with a variety of features to suit the needs of engineers and mathematicians, including extensive statistical analysis & graphing capabilities. However, it is extremely simple to use and is suitable for anyone who needs an advanced calculator. The name of the DES-38D calculator comes from the fact that it utilizes base-10 arithmetic which can represent numbers with a 38-digit mantissa and an exponent range of -128 to + 127. The DES-38D is universal app that is fully functional in both portrait and landscape modes on all iPad and iPhone devices. No need to rotate to landscape unless you need a wider display area. All current and future features are included for one low price. We will never nag you for more money. KEY FEATURES: • Supports Hex, Binary, and Octal number bases in 64-bit, 32-bit, 16-bit, or 8-bit word lengths • Accepts data entry in Decimal, Scientific, or Fractional notation (& they can be mixed) • Memory and Result data can be displayed in Decimal, Scientific, or Fractional notation independently of how the equation was entered • Angle entry and computations can be performed in degrees, radians, gradians, or turns • 10 Memory Registers • 4 Display Lines: Equations, Result, current Memory Register, and Error/Information Messages • All Display Lines read in normal human, left-to-right form • The [-] key can be used for subtraction or negation as you type - no need to use the [+/-] key after the fact (although you can) • All equations are evaluated, and the Result field is updated "on-the-fly" as you enter your formula. The [=] key merely saves the equation & result to the History/Tape file • All Equations & Results are saved in a History/Tape file • Equations & Results can be recalled from the History/Tape file for reuse in other equations • Sliders to rapidly adjust Display Precision, Decimal-to-Scientific notation switching, and Decimal to Fraction notation switching • Keys for e and π plus a table with many additional scientific and mathematical constants that can easily be included in equations • Extensive built-in help screens • Copy and paste with simple tap and long touch gestures • Use swipe gestures to rapidly display all Memory Registers at once, all Constants, and the History/Tape file • Fast and simple advanced statistics functions - simply enter a data set and instantly get over 90 statistical calculations including 8 different regressions as well as a graphic plot of the regression lines • Up to 10 Statistics Data Sets with the ability to import CSV files and print, email, or share Data Sets and Calculation Results ------------------------------- LIST OF MATH & LOGIC FUNCTIONS • Add, Subtract, Multiply & Divide (of course) • Floored and Euclidean Modulus • Percentages - including Percentage, Add-On, Discount, and Ratio calculations • Square, Cube, and nth roots • Square, Cube, and nth powers • Base-10, Base-2, Base-n, and Natural Logarithms • 24 Trigonometric Functions • Combinations & Permutations • Coordinate Conversions between Polar & Rectangular • A number of Random Number Generators to simulate coin flips, dice throws, card draws and general purpose random numbers • Reciprocals • Factorials & Double Factorials • AND, NAND, OR, NOR, XOR, XNOR, NOT • Shift and Rotate Bits * Advanced Statistics with over 90 statistics values including the results of 8 different regressions plus graphing capability ------------------------- We welcome your feedback. The app includes an email option to send comments or suggestions to us at support@dohmann.com If you enjoy our app, please rate and review us in the App Store. Thank you for using DES-38D. ## Key features - Multi-line display with left-to-right entry - Supports Hex, Binary, Octal number bases - Decimal, Scientific, Fractional notation - Angle entry in degrees, radians, gradians, turns - 10 Memory Registers - Advanced statistics and graphing - Import CSV files for data sets ## Chart rankings - #197 in Top Paid · Utilities (US App Store) ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/scientific-calculator-des-38d/id1379779839/reviews.md ### 3/5 — Waste of money *2021-12-29* Bought this to help with studying radicals. Root index will only show as a “4” no matter what you type in as the index! Layout is not intuitive **Developer response:** As explained in the User Guide, the symbol used for arbitrary roots indicates a “4th or greater root operation”. There is no better single-character symbol available to indicate an arbitrary root operation. We chose that option over wasting display spaces by using multiple characters to indicate the exact root since it’s obvious by the index number you enter. How much more intuitive can a scientific calculator be? If you have suggestions for improvement, we would welcome them. Does any other scientific calculator app have a user guide as detailed as this one? Tap on the info icon to peruse the in-app docs or you can email or print the entire 27-page manual. I hope your attitude toward our app will improve as you become more familiar with it. Again, we welcome any suggestions for improvement. ### 5/5 — Sci Calc 38D Review. *2018-09-20* This is a very comprehensive app with excellent support from the developer. A good spread of regression equations with detailed information available as part of the help section. A very comprehensive scientific calculator with a wide range of functions. Printing graphs uses the photos app which allows the user a lot of flexibility before printing using air print. In my opinion a useful mathematical aid for those working in industry, schools and further education establishments. It works very well on the Apple iPad Pro with its excellent graphics. Peter Day September 20th 2018 ## Frequently asked questions about Scientific Calculator DES ### What is the price of Scientific Calculator DES-38D? Scientific Calculator DES-38D is a paid app priced at $5.99. The developer states that all current and future features are included for this one-time low price, with no further in-app purchases or nagging for money. ### Does Scientific Calculator DES-38D have ads? No, Scientific Calculator DES-38D is ad-free. The developer explicitly mentions that users will not be nagged for more money and all features are included in the initial purchase. ### What devices support Scientific Calculator DES-38D? Scientific Calculator DES-38D is a universal app and is fully functional on all iPads and iPhones. It supports both portrait and landscape modes, with landscape mode offering a wider display area. ### How often is Scientific Calculator DES-38D updated? The latest version of Scientific Calculator DES-38D is 1.10, which was last updated on December 18, 2024. The app was originally released on May 27, 2018. ### What are the statistical capabilities of Scientific Calculator DES-38D? Scientific Calculator DES-38D offers fast and simple advanced statistics functions. Users can enter a data set and instantly get over 90 statistical calculations, including 8 different regressions and graphic plots of regression lines. ### Can I import data into Scientific Calculator DES-38D? Yes, Scientific Calculator DES-38D allows you to import CSV files for your data sets. You can also print, email, or share these Data Sets and Calculation Results. ### What number bases does Scientific Calculator DES-38D support? Scientific Calculator DES-38D supports Hexadecimal, Binary, and Octal number bases. It also supports 64-bit, 32-bit, 16-bit, or 8-bit word lengths for these bases. ### What is the age rating for Scientific Calculator DES-38D? Scientific Calculator DES-38D has an age rating of 4+. This indicates it is suitable for children aged 4 and above, suggesting simple and safe functionality. ## Version history (last 5 releases) ### 1.10 — 2024-12-18 Updated for compatibility with iOS18 ### 1.09 — 2023-04-04 Fixed a bug where a leading E was reported as an erroneous entry when in Hex Entry Mode. ### 1.08 — 2023-02-28 User Interface Improvements ### 1.07 — 2021-06-05 Updates for iOS14 and iPhone 12 capability Some bug fixes Corrected some typos Some UI improvements Added a full pdf User Guide version of the on-line help screens that can be emailed or printed ### 1.06 — 2020-06-26 Minor UI improvements iOS 13 and iPhone 11 compatibility ## Apps similar to Scientific Calculator DES | App | Rating | Price | Category | | --- | --- | --- | --- | | [Calculator +](https://appshunter.io/ios/app/calculator-plus/id351815470) | 4.6 (9,997) | Free | Utilities | | [Calc Pro - The Top Calculator](https://appshunter.io/ios/app/calc-pro-the-top-calculator/id438580059) | 4.7 (358) | $7.99 | Utilities | | [Calculator SC-323PU](https://appshunter.io/ios/app/calculator-sc-323pu/id301290196) | 4.7 (118) | $3.99 | Utilities | | [Calculator₊](https://appshunter.io/ios/app/calculator/id398129933) | 4.7 (1,726,794) | Free | Utilities | | [Calculi: Scientific Calculator](https://appshunter.io/ios/app/calculi-scientific-calculator/id452182503) | 4.4 (374) | Free | Utilities | | [Calculator #](https://appshunter.io/ios/app/calculator/id458535080) | 4.6 (35,876) | Free | Utilities | ## More apps by Dohmann Engineering Services - [Floating Point Converter](https://appshunter.io/ios/app/floating-point-converter/id413370135) - [iConvert Hex Decimal Binary](https://appshunter.io/ios/app/iconvert-hex-decimal-binary/id419214766) - [iTempConvert Plus](https://appshunter.io/ios/app/itempconvert-plus/id421185599) - [RTD Reference](https://appshunter.io/ios/app/rtd-reference/id424267590) - [Converter-Calculator](https://appshunter.io/ios/app/converter-calculator/id513419019) All apps by Dohmann Engineering Services: https://appshunter.io/developer/401682475 --- *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 2026-08-18.*