Version History
Here you can find the changelog of TechCalc+ Calculator since it was posted on our website on 2015-04-27.
The latest version is 5.1.2 and it was updated on soft112.com on 26 March, 2024.
See below the changes in each version:
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 2023-06-10
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 2021-10-09
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 4.7.7
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 4.6.8
posted on 2020-10-20
ver 4.6.8:
★ fixed a crash when pressing the AC button whilst in Edit mode
ver 4.6.7:
★ 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 2020-09-10
ver 4.6.6:
★ fixed bugs reported by users
version 4.6.5
posted on 2020-08-31
ver 4.6.5:
★ bug fix in Exchange Rates for Russian translation of the app
ver 4.6.4:
★ 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 4.6.4
posted on 2020-08-29
ver 4.6.4:
★ 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 4.6.3
posted on 2020-08-10
ver 4.6.3:
★ 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 4.6.2
posted on 2020-07-19
ver 4.6.2:
★ 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 4.6.1
posted on 2020-07-13
ver 4.6.1:
★ minor bug fixes and performance enhancements
version 4.6.0
posted on 2020-07-07
ver 4.6.0:
★ 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 4.5.9
posted on 2020-06-21
ver 4.5.9:
★ 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 4.5.8
posted on 2020-06-08
ver 4.5.8:
★ 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 4.5.7
posted on 2020-05-28
ver 4.5.7:
★ added 3 new options to the Settings - please see the Change Log for details
version 4.5.6
posted on 2020-04-28
ver 4.5.6:
★ 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 4.5.5
posted on 2020-03-02
ver 4.5.5:
★ minor bug fixes
version 4.5.4
posted on 2020-01-03
ver 4.5.4:
★ Conversion Factors: included additional cryptocurrencies in the exchange rates
version 4.5.3
posted on 2019-12-14
ver 4.5.3:
★ fixed bugs reported by users
version 4.5.2
posted on 2019-12-05
ver 4.5.2:
★ added IP Subnet Calculator to the Reference Section
version 4.5.1
posted on 2019-11-20
ver 4.5.1:
★ fixed bugs reported by users
version 4.5.0
posted on 2019-11-12
ver 4.5.0:
★ bug fix for some devices unable to increase/decrease text size by long pressing either the + or - buttons respectively
ver 4.4.9:
★ 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 4.4.9
posted on 2019-11-10
ver 4.4.9:
★ 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 4.4.8
posted on 2019-09-25
ver 4.4.8:
★ 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 4.4.7
posted on 2019-09-17
ver 4.4.6 - 4.4.7:
★ 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 4.4.5
posted on 2019-08-28
ver 4.4.5:
★ bug fix in Graphing Calculations: 3D Surface Plot
ver 4.4.4:
★ added Bicycle Tire Pressure Calculator to the Reference Section
★ bug fixes
version 4.4.0
posted on 2019-07-04
04/07 (ver 4.4.0)
★ bug fix in Conversion Factors
29/06 (ver 4.3.9)
★ added IEEE 754 Converter to the Reference Section
★ added "Finance - Loan Calculations" to Quick Formulas
★ added an option in the "Button Options" group of the Settings to enable a sound when a button is pressed
★ rearranged buttons in Basic mode
version 4.1.7
posted on 2018-02-04
05/02 (ver 4.1.7)
* added an option in the Settings: "Back Button - Return directly to Sci Calc screen"
version 4.0.0
posted on 2016-10-04
05/10 (ver 4.0.0),* added Integer Sequences (Fibonacci Numbers, Catalan Numbers and Polygonal Numbers) to the Reference Section,* Calculus (Derivative and Indefinite Integral) - after the calculation, long press the output display to show a graph of the input and result
version 2.2
posted on 2011-05-04
Several fixes and updates