Version 4.76 Update:
       • Fixed an issue where calculation mode (RPN/Algebraic) would occasionally reset to chain mode.
Version 4.75
Enhanced External Keyboard Support:
• For MacOS users: Keyboard support for non-touchscreen devices
• Support for Bluetooth keyboards on iPhone and iPad
• Faster data entry with numeric keypads
• Added support for Enter and Clear keys on Apple numeric keypads
• New letter key shortcuts: Shift for secondary functions, STO for quick store, RCL for easy recall

This update improves usability for iPad users and adds convenient keyboard input for those using the app on MacOS devices. Full documentation on external keyboard support and other features available on our website.

Enhanced External Keyboard Support:
• For MacOS users: Keyboard support for non-touchscreen devices
• Support for Bluetooth keyboards on iPhone and iPad
• Faster data entry with numeric keypads
• Added support for Enter and Clear keys on Apple numeric keypads
• New letter key shortcuts: Shift for secondary functions, STO for quick store, RCL for easy recall

This update improves usability for iPad users and adds convenient keyboard input for those using the app on MacOS devices. Full documentation on external keyboard support and other features available on our website.

We're excited to bring you these latest improvements to enhance your calculator experience:

- New Right-Swipe Gesture added to the List Manager.
   - Copy the current value to the stack.
   - Move the current row to the top of the list.  Useful for Cash Flows.
   - Streamlines your workflow for managing  lists.

- Enhanced Accessibility:
   - Additional accessibility descriptions have been added.

- Try Before You Buy:
   - Our financial version of CALC 1 is now free to download.
   - Perfect for those wanting to test drive our app before upgrading to this programmable version.

Minor updates to plotting.

An updated Bonds calculator with Redemption Value.
The toolbar buttons within the History Detail section, namely "Create Key," "Create Function," and "Keep," have been updated to display symbols instead of text. This modification enhances interface adaptability, ensuring optimal button visibility across various text accessibility settings.

Updates for the latest iOS.

Minor updates for current iOS.

Version 4.50
Minor updates for the latest iOS.

Version 4.40
This is a major free update with a new plotting frameworks with over 30 new plots for easy plotting of expressions and data to communicate information clearly and efficiently.

A new Expression calculator includes keys for “1 tap” plotting of the current expression, 1 to 5 stored expressions, expression with shading, and parameter plotting. The plotting is combined with keys to solve, integrate, calculate max, min, calculate where 2 expressions are equal and dydx to help you analyze expressions.

Copy, paste, plot!
Copy data to the clipboard, paste it into the List Manager. Then with 1 tap create histograms, box plots, normal probability plots, scatter diagrams and more.

The updated 1 List Statistics calculator will plot histograms or 1-5 box plots from list data. It also has new keys for 1 tap calculation of summary stats, percentile, inverse percentile and sorting.

New Normal and Student’s t Distribution calculators feature z/t tests and intervals from calculated or entered data. Tests can be plotted as well as lower tail, upper tail, two tail or central PDF plots. There is a key to plot a normal probability plot of the data and another to create lists of random normally distributed values from the entered mean, standard deviation and n values.

The updated 2 List Statistics calculator will plot list data.
The curve fitting calculators will plot scatter plots with the the best fit lines by simply pressing the “plot” key.

The plots use Apple System Colors that automatically adapt to both light and dark modes, vibrancy and changes in accessibility settings like increased contrast.

To help the entry and managing of data, lists of data can be stored and recalled with the standard STO/RCL keys. Each calculator that uses lists of data now has 5 keys to STO and RCL the lists that are unique to that calculator. In addition, there are 8 lists that are shared between calculators.

Lists and other data can be viewed and edited in the new Data Manager.

Now CALC 1 can open text files containing data for analysis. From the Apple Files app, files can be opened by CALC 1. Then the file can be viewed and edited in the Data Manager and then parsed and copied to the CALC 1 statistics lists for quick and accurate entry of data!

Data can be manually entered, pasted from the clipboard using the List Manager, imported from a text/csv file (or AirDrop) into the Data Manager or dictated into the Data Manager. Getting data entered quickly and accurately is important and CALC 1 has the tools for the job!

This is a major free update with a new plotting frameworks with over 30 new plots for easy plotting of expressions and data to communicate information clearly and efficiently.

A new Expression calculator includes keys for “1 tap” plotting of the current expression, 1 to 5 stored expressions,  expression with shading, and parameter plotting.  The plotting is combined with keys to solve, integrate, calculate max, min, calculate where 2 expressions are equal and dydx to help you analyze expressions.

Copy, paste, plot!
Copy data to the clipboard, paste it into the List Manager.  Then with 1 tap create histograms, box plots, normal probability plots, scatter diagrams and more.

The updated 1 List Statistics  calculator will plot histograms or 1-5 box plots from list data.  It also has new keys for 1 tap calculation of summary stats, percentile, inverse percentile and sorting.

New Normal and Student’s t Distribution calculators feature z/t tests and intervals from calculated or entered data.  Tests can be plotted as well as lower tail, upper tail, two tail or central PDF plots.  There is a key to plot a normal probability plot of the data and another to create lists of random normally distributed values from the entered mean, standard deviation and n values.

The updated 2 List Statistics calculator will plot list data.
The curve fitting calculators will plot scatter plots with the the best fit lines by simply pressing the “plot” key.

The plots use Apple System Colors that automatically adapt to both light and dark modes, vibrancy and changes in accessibility settings like increased contrast.

To help the entry and managing of data, lists of data can be stored and recalled with the standard STO/RCL keys. Each calculator that uses lists of data now has 5 keys to STO and RCL the lists that are unique to that calculator.  In addition, there are 8 lists that are shared between calculators.

Lists and other data can be viewed and edited in the new Data Manager.

Now CALC 1 can open text files containing data for analysis.  From the Apple Files app, files can be opened by CALC 1.  Then the file can be viewed and edited in the Data Manager and then parsed and copied to the CALC 1 statistics lists for quick and accurate entry of data!

Data can be manually entered, pasted from the clipboard using the List Manager, imported from a text/csv file (or AirDrop) into the Data Manager or dictated into the Data Manager.  Getting data entered quickly and accurately is important and CALC 1 has the tools for the job!

Updates to the plotting!
Plots now use System Colors that adjust to dark mode and automatically adapt to changes in accessibility settings like Increase Contrast.
All of the parameter values are now shown on the plots from the Function Calculators.
A new toolbar button will quickly display the latest history detail.
A new expression editor allows full keyboard editing of expressions.
Expressions can be restored from history.

A button to automatically create a Function Calculator from an algebraic expression has been added. This is an easy way turn an expression into a Function Calculator so the function can be plotted and you can solve for “x” as well calculate “f(x)” for different values of ‘x’.  This button is next to the ‘Create Key” button in the History Detail for algebraic expressions.  Now users have more ways to customize CALC 1 help them save time and reduce mistakes with the problems they face the most.

A Search Bar has been added to the Function Calculator list now that there are over 60 of them with more being added.

This version contains support for external keyboards.
Numeric entry (0-9) and most expressions (+, -, *, /) can be performed with an external keyboard on the CALC 1 calculators and the HP reproductions.
See the ‘Keyboard Support’ page under the ‘Getting Started’ section of the documentation.

This update covers the changes for iOS 13 (support for Dark and Light Appearance).
Amortization has been added TVM Form Calculator.
The TVM, Bonds and Depreciation calculators user interfaces have been updated to "Table Views" to make them better adopt to different devices and sizes.  Now all Form Calculators use Table Views.

For version 4.16: New functions to support the new Probabilities and Sports Odds Focused Calculators. 

13 new probability Function Calculators for a total of 25!
Discrete distributions: Binomial, Geometric, Negative Binomial, Hypergeometric, Poisson.
Continuous distributions: Normal, Exponential, Gamma, Weibull, Log Normal, Beta, Chi-Squared, T-Distribution, F-Distribution.
Many of the CDF calculators will also calculate the inverse with solving.
A new Triangles Focused Calculator to calculate the solution of plane triangles. Enter 3 of the 6 main characteristics and this calculator will calculate the remaining characteristics.
We updated the CALC 1 TVM Focused Calculators with STO/RCL of all of the TVM values (N, I/YR, PV, PMT, FV, P/YR, C/YR, PER1, PER2 BEG/END) at once! Now you can STO different initial values or quickly switch between different scenarios.
This STO/RCL “object” feature has also been added to the Ratios and Triangles Focused Calculators.

We enhanced the status annunciators to display all the values not shown on the key previews. So instead of just BEG mode the P/YR, PER1 PER2 are displayed.
Each status annunciator is specific to the Focused Calculator so, for example, BEG, P/YR are only shown on the financial calculators that use them and DEG is only shown on calculators with trigonometry functions.

A Function Calculator “Duplicate” command has been added to allow existing calculators to be duplicated in order to customize them.

For version 4.15: The results of the History Item when solving for a Function Calculator parameter has been changed to the value of the parameter.

13 new probability Function Calculators for a total of 25!
Discrete distributions: Binomial, Geometric, Negative Binomial, Hypergeometric, Poisson.
Continuous distributions: Normal, Exponential, Gamma, Weibull, Log Normal, Beta, Chi-Squared, T-Distribution, F-Distribution.
Many of the CDF calculators will also calculate the inverse with solving.
A new Triangles Focused Calculator to calculate the solution of plane triangles. Enter 3 of the 6 main characteristics and this calculator will calculate the remaining characteristics.

We updated the CALC 1 TVM Focused Calculators with STO/RCL of all of the TVM values (N, I/YR, PV, PMT, FV, P/YR, C/YR, PER1, PER2 BEG/END) at once! Now you can STO different initial values or quickly switch between different scenarios.
This STO/RCL “object” feature has also been added to the Ratios and Triangles Focused Calculators.

We enhanced the status annunciators to display all the values not shown on the key previews. So instead of just BEG mode the P/YR, PER1 PER2 are displayed.
Each status annunciator is specific to the Focused Calculator so, for example, BEG, P/YR are only shown on the financial calculators that use them and DEG is only shown on calculators with trigonometry functions.

A Function Calculator “Duplicate” command has been added to allow existing calculators to be duplicated in order to customize them.

For version 4.15: The results of the History Item when solving for a Function Calculator parameter has been changed to the value of the parameter.

13 new probability Function Calculators for a total of 25!
Discrete distributions: Binomial, Geometric, Negative Binomial, Hypergeometric, Poisson.
Continuous distributions: Normal, Exponential, Gamma, Weibull, Log Normal, Beta, Chi-Squared, T-Distribution, F-Distribution.
Many of the CDF calculators will also calculate the inverse with solving.

A new Triangles Focused Calculator to calculate the solution of plane triangles. Enter 3 of the 6 main characteristics and this calculator will calculate the remaining characteristics.

We updated the CALC 1 TVM Focused Calculators with STO/RCL of all of the TVM values (N, I/YR, PV, PMT, FV, P/YR, C/YR, PER1, PER2 BEG/END) at once! Now you can STO different initial values or quickly switch between different scenarios.
This STO/RCL “object” feature has also been added to the Ratios and Triangles Focused Calculators.

We enhanced the status annunciators to display all the values not shown on the key previews. So instead of just BEG mode the P/YR, PER1 PER2 are displayed.
Each status annunciator is specific to the Focused Calculator so, for example, BEG, P/YR are only shown on the financial calculators that use them and DEG is only shown on calculators with trigonometry functions.

A Function Calculator “Duplicate” command has been added to allow existing calculators to be duplicated in order to customize them.

13 new probability Function Calculators for a total of 25!
Discrete distributions: Binomial, Geometric, Negative Binomial, Hypergeometric, Poisson.
Continuous distributions: Normal, Exponential, Gamma, Weibull, Log Normal, Beta, Chi-Squared, T-Distribution, F-Distribution.  Many of the CDF calculators  will also calculate the inverse with solving.

A Function Calculator “Duplicate” command has been added to allow existing calculators to be duplicated in order to customize them.

A new Triangles Focused Calculator to calculate the solution of plane triangles.  Enter 3 of the 6 main characteristics and this calculator will calculate determine the best (SSS, SAS, SSA, ASA,AAS) meth to calculate the remaining characteristics. The "key preview" values are shown on the respective keys.

The status annunciators will alert you if there are 2 solutions for some SSA cases.   This History item example gives more information if you wish to find the other solution:

Calculates the diameter of the triangle's circumcircle.
Another solution exists if angle 45.58
is set to 180 - 45.58 = 134.4
7.000 : Side a.
13.56 : Side b.
10.00 : Side c.
30.00 : Angle α.
104.4 : Angle β.
45.58 : Angle γ.
33.90 : The area.
14.00 : The diameter of the triangle's circumcircle.

We updated the CALC 1 TVM Focused Calculators with STO/RLC of all of the TVM values (N, I/YR, PV, PMT, FV, P/YR, C/YR, PER1, PER2 BEG/END) at once!  Now you can STO different initial values or quickly switch between different scenarios.

Enhanced the status annunciators to display all the values not shown on the key previews.  So instead of just BEG mode the P/YR, PER1 PER2 are displayed.

This STO/RCL “object” feature has also been added to the Ratios and Triangles Focused Calculators.

Each status annunciator is specific to the Focused Calculator so, for example,  BEG, P/YR are only shown on the financial calculators that use them and DEG is only shown on calculators with trigonometry functions.