Version History
Here you can find the changelog of TechCalc Scientific Calculator since it was posted on our website on 2019-09-11.
The latest version is 5.1.3 and it was updated on soft112.com on 23 April, 2024.
See below the changes in each version:
version 5.1.3
posted on 2024-04-09
ver 5.1.3:
★ minor bug fixes and library updates
version 5.1.2
posted on 2024-03-16
ver 5.1.2:
★ fixed problem with back button that was affecting some devices
version 5.1.0
posted on 2024-01-29
ver 5.1.0:
★ minor bug fixes and library updates
version 5.0.9
posted on 2023-11-02
ver 5.0.9:
★ library updates
version 5.0.8
posted on 2023-08-04
ver 5.0.8:
★ Financial Mode, Options Trading (Greeks): added the possibility to calculate either the implied volatility or the option price
★ Settings, Calculation Parameters: added 2 options relating to implicit multiplication - please see the topic "Implicit Multiplication" in the Help section for details
★ fixed bugs reported by users
version 5.0.8
posted on 2023-08-03
ver 5.0.8:
★ Financial Mode, Options Trading (Greeks): added the possibility to calculate either the implied volatility or the option price
★ Settings, Calculation Parameters: added 2 options relating to implicit multiplication - please see the topic "Implicit Multiplication" in the Help section for details
version 5.0.7
posted on 2023-07-06
ver 5.0.7:
★ Functions ("FUNC" button): functions are now divided into 9 categories for ease of discovery - please see the topic "Functions ("FUNC" button)" in the Help section for details
version 5.0.6
posted on 2023-06-23
ver 5.0.6:
★ Custom Themes: added option to use rgb values to determine colors
★ Calculus: added option "Add result to History" for Numerical Derivative and Definite Integral - please see the topic "Calculus" in the Help section for details
★ fixed bugs reported by users
version 5.0.5
posted on 2023-06-08
ver 5.0.5:
★ Graphing Calculations: added "Implicit Equations" - please see the topic "Graphing Calculations" in the Help section for details
★ Settings, Output Display: added option "Popups - Change Text Size"
version 5.0.4
posted on 2023-05-08
ver 5.0.4:
★ bug fixes, minor function enhancements and library updates
version 5.0.3
posted on 2023-03-09
ver 5.0.3:
★ Equation Solver: added "Solve Exponents of an Exponential Equation" - please see the Help section for details
version 4.9.6
posted on 2022-04-05
ver 4.9.6:
★ fixed bugs reported by users
version 4.9.5
posted on 2022-03-10
ver 4.9.5:
★ minor bug fixes and performance enhancements
version 4.9.4
posted on 2022-02-22
ver 4.9.4:
★ fixed bugs reported by users
version 4.9.3
posted on 2022-02-06
ver 4.9.3:
★ Conversion Factors: added Electric Charge to the list of choices
version 4.9.2
posted on 2021-12-07
ver 4.9.2:
★ minor bug fixes and performance enhancements
version 4.9.1
posted on 2021-11-14
ver 4.9.1:
★ fixed bugs reported by users
version 4.9.0
posted on 2021-11-01
ver 4.9.0:
★ minor bug fixes and performance enhancements
version 4.8.9
posted on 2021-10-08
ver 4.8.9:
★ fixed problem when downloading FOREX rates on devices running older versions of Android
version 4.8.8
posted on 2021-09-20
ver 4.8.8:
★ Standard Themes: fixed a bug when choosing any of the scrolling themes
ver 4.8.7:
★ Time Calculator: fixed bug when inserting a value from a memory register
version 4.8.7
posted on 2021-09-16
ver 4.8.7:
★ Time Calculator: fixed bug when inserting a value from a memory register
version 4.8.5
posted on 2021-06-24
ver 4.8.5:
★ fixed bugs reported by users
version 4.8.4
posted on 2021-06-05
ver 4.8.4:
★ Calculus: added Numerical Derivative to the list of modes
version 4.8.3
posted on 2021-05-04
ver 4.8.3:
★ added Permutations (nPr) & Combinations (nCr) to Quick Formulas
★ Settings (Screen Modes): added an option, "Reference Section - Arrange List of Options"
version 4.8.2
posted on 2021-04-23
ver 4.8.2:
★ Financial: "Cost, Sales and Margin Mode" is now "Cost, Sales, Margin and Markup Mode"
★ Settings (Output Display): added an option, "Graph Mode - Dark Background"
version 4.8.1
posted on 2021-04-02
ver 4.8.1:
★ fixed bugs reported by users
ver 4.8.0:
★ Financial: added a new category, "Growing Annuity Mode", and also added Extended Internal Rate of Return (XIRR) and Extended Net Present Value (XNPV) to Cash Flow Mode. Please see the Financial topic of the Help Section for details
version 4.8.0
posted on 2021-03-29
ver 4.8.0:
★ Financial: added a new category, "Growing Annuity Mode", and also added Extended Internal Rate of Return (XIRR) and Extended Net Present Value (XNPV) to Cash Flow Mode. Please see the Financial topic of the Help Section for details
version 4.7.9
posted on 2021-03-16
ver 4.7.9:
★ added Natural Logarithm Table and Natural Antilogarithm Table (eˣ) to Mathematical Tables in the Reference Section
version 4.7.8
posted on 2021-03-12
ver 4.7.8:
★ fixed display problems on some high-aspect ratio phones
ver 4.7.7:
★ added the option to batch delete a group of records from the calculation history - please see the topic "History" in the Help section for details
★ implemented the requirements regarding the compulsory use of scoped storage for devices running Android version 11 and above - for these devices, the Downloads folder is now used when importing or exporting files
version 4.7.7
posted on 2021-03-09
ver 4.7.7:
★ added the option to batch delete a group of records from the calculation history - please see the topic "History" in the Help section for details
★ implemented the requirements regarding the compulsory use of scoped storage for devices running Android version 11 and above - for these devices, the Downloads folder is now used when importing or exporting files
★ fixed bugs reported by users
version 4.7.6
posted on 2021-02-12
ver 4.7.6:
★ Polygon Area Calculator: added an "Interactive Polygon" to the list of choices - please see the inline Help for details
★ Conversion Factors (Blood Sugar Level): added glycated hemoglobin (HbA1c, % and mmol/mol) to the list of choices
version 4.7.5
posted on 2021-01-27
ver 4.7.5:
★ fixed bugs reported by users
version 4.7.4
posted on 2021-01-16
ver 4.7.4:
★ Polygon Area Calculator: added an option to use degrees, minutes and seconds for the geographical coordinates when computing a geodesic polygon
version 4.7.3
posted on 2021-01-05
ver 4.7.3:
★ added Lucas Numbers to Numerical Sequences - please see the topic "Numerical Sequences" in the Help Section for details
★ fixed bugs reported by users
version 4.7.2
posted on 2020-12-31
ver 4.7.2:
★ fixed bugs reported by users
version 4.7.1
posted on 2020-12-08
ver 4.7.1:
★ added Polygon Area Calculator and the Beaufort Wind Scale to the Reference Section
★ added the ability to save the output from the Ephemerides Calculator to a pdf file
★ Settings (Themes): added an option to replace all black background settings with a white background
version 4.7.0
posted on 2020-11-02
ver 4.7.0:
★ fixed a crash when selecting Settings : Button Options
ver 4.6.9:
★ added equinoxes and solstices to the output from the Ephemerides Calculator
version 4.6.7
posted on 2020-10-20
ver 4.6.7:
★ fixed a crash when pressing the AC button whilst in Edit mode
ver 4.6.6:
★ added Ephemerides Calculator to the Reference Section
★ added Fixed Decimal Notation to the list of options in the Display Format Selection tab in the "Calculation Parameters" group of the Settings - please see the topic "General" in the Help Section for details
version 4.6.6
posted on 2020-10-17
ver 4.6.6:
★ added Ephemerides Calculator to the Reference Section
★ added Fixed Decimal Notation to the list of options in the Display Format Selection tab in the "Calculation Parameters" group of the Settings - please see the topic "General" in the Help Section for details
version 4.6.5
posted on 2020-09-10
ver 4.6.5:
★ fixed bugs reported by users
version 4.6.4
posted on 2020-08-31
ver 4.6.4:
★ bug fix in Exchange Rates for Russian translation of the app
ver 4.6.3:
★ Settings (Themes): added an option in the lists of themes - "Long press a list item to preview that theme"
★ Conversion Factors (Exchange Rates): expanded the list of currencies. The list is now sorted automatically by the ISO code of each currency
version 4.6.3
posted on 2020-08-29
ver 4.6.3:
★ Settings (Themes): added an option in the lists of themes - "Long press a list item to preview that theme"
★ Conversion Factors (Exchange Rates): expanded the list of currencies. The list is now sorted automatically by the ISO code of each currency - please see the topic "Conversion Factors" in the Help Section for details
version 4.6.2
posted on 2020-08-09
ver 4.6.2:
★ added conversions between various 3D coordinate systems (Cartesian, Spherical and Cylindrical) to the list of functions ("Func" button)
★ Numerical Sequences: added ability to save the result from a range of numbers to a CSV file
★ Financial: the list for the FOREX button can now be manually rearranged using drag and drop
★ please see the Change Log for more details
version 4.6.1
posted on 2020-07-22
ver 4.6.1:
★ bug fix in Conversion Factors inadvertently introduced in the previous update
ver 4.6.0:
★ added Prime Numbers to Numerical Sequences - please see the topic "Numerical Sequences" in the Help Section for details
★ calculators from the reference section that are added via the Settings to the main menu are now automatically removed from the reference section
version 4.5.9
posted on 2020-07-13
ver 4.5.9:
★ minor bug fixes and performance enhancements
version 4.5.8
posted on 2020-07-07
ver 4.5.8:
★ Financial: added the DAYS360 function. Please see the topic "Days Calculation Mode" in the Financial topic of the Help Section for details
★ Calculus / Graphing Calculations (Standard Mode): added ability to export/import functions to/from a personal function library via the LIB button
★ added an option in the "Screen Modes" group of the Settings: Main Menu - Arrange Calculator List
version 4.5.7
posted on 2020-06-21
ver 4.5.7:
★ added Geodetic Distance Calculator to the Reference Section
★ added options in the "General Settings" group of the Settings to export / import the Settings values to / from a file
★ minor bug fixes and performance enhancements
version 4.5.6
posted on 2020-06-08
ver 4.5.6:
★ added Wind Chill Calculator to the Reference Section
★ added an option in the "Calculation Parameters" group of the Settings: Calculus / Graphing Calculations: Standard Mode - Treat multiples of x as one unit. Please see the topic "Calculus" or the topic "Graphing Calculations" in the Help Section for details
version 4.5.5
posted on 2020-05-28
ver 4.5.5:
★ added 3 new options to the Settings - please see the Change Log for details
version 4.5.4
posted on 2020-04-28
ver 4.5.4:
★ added the Lambert W Function to the list of functions ("Func" button) - for more details please long press the option "Lambert W Function" after pressing the Func button
version 4.5.3
posted on 2020-03-02
ver 4.5.3:
★ minor bug fixes
version 4.5.2
posted on 2020-01-03
ver 4.5.2:
★ Conversion Factors: included additional cryptocurrencies in the exchange rates
version 4.5.1
posted on 2019-12-14
ver 4.5.1:
★ fixed bugs reported by users
version 4.5.0
posted on 2019-12-05
ver 4.5.0:
★ added IP Subnet Calculator to the Reference Section
version 4.4.9
posted on 2019-11-20
ver 4.4.9:
★ fixed bugs reported by users
version 4.4.8
posted on 2019-11-12
ver 4.4.8:
★ bug fix for some devices unable to increase/decrease text size by long pressing either the + or - buttons respectively
ver 4.4.7:
★ added Coordinates Converter and Unit Price Comparison to the Reference Section
★ added additional means of stack manipulation in RPN mode - please see the topic "Reverse Polish Notation (RPN)" in the Help Section for details
★ added ability to edit, and display a running total for, simple calculations on the main screen of Financial modes
version 4.4.7
posted on 2019-11-10
ver 4.4.7:
★ added Coordinates Converter and Unit Price Comparison to the Reference Section
★ added additional means of stack manipulation in RPN mode - please see the topic "Reverse Polish Notation (RPN)" in the Help Section for details
★ added ability to edit, and display a running total for, simple calculations on the main screen of Financial modes
version 4.4.6
posted on 2019-09-25
ver 4.4.6:
★ added ability to do simple calculations on the main screen of Financial mode
★ added an option in the "Calculation Parameters" group of the Settings: Financial - Keep trailing zeros in simple calculations
★ added an option in the "Screen Modes" group of the Settings: Swipe Screen - Arrange Calculator List. Please see the topic "Screen Transitions" in the Help Section for details
★ bug fixes
version 4.4.5
posted on 2019-09-17
ver 4.4.4 - 4.4.5:
★ added options in the "General Settings" group of the Settings for Basic, Sci Calc and Hex/Oct/Bin modes to use Reverse Polish Notation (RPN) - please see the topic "Reverse Polish Notation (RPN)" in the Help Section for details
★ added Cooking Temperature Scales to the Reference Section
★ added an option in the "Output Display" group of the Settings: Basic - Enable Calculation Mode Message
★ please see the change log for more information
version 4.4.3
posted on 2019-08-28
ver 4.4.3:
★ bug fix in Graphing Calculations: 3D Surface Plot
ver 4.4.2:
★ added Bicycle Tire Pressure Calculator to the Reference Section
★ bug fixes