At the bottom of the page are tables of detailed features.
The default "Financial: TVM I/YR" Focused Calculator is similar to the TI BAII except there is no CPT key.
The Auto STO "AS" annunciator will turn on when you have entered a number to let you know that then number will be stored when you tap the N, I/YR, PV, FV keys. Otherwise the value will be calculated. If there is any question, hold the key down and the hint will tell you if you are storing or calculating.
If, for example, you tap the PMT key and the value you just entered is stored as the PMT (you will see the value on the key), just tap it again to calculate the value.
This calculator has P/YR and C/YR (compounding periods). The C/YR is set to the P/YR value when you store it and is not cleared when you tap "clr f". This is similar to the TO BAII behavior.
The CALC 1 equivalent of the "2nd" key is the "shift" key. The STO and RCL keys also give the keys alternate functionality and are usually reserved for storing and recalling values as opposed to computing them. Pressing shift a second time will cancel the shift mode. Cancel STO or RCL by tapping a key without a label.
Note that you can press and hold a key to display a hint for that key. Dragging your finger off of the key will prevent the key function from being executed. If you mistakenly tap a key, CALC 1 has undo support.
Instead of a single line, 7 segment display, CALC 1 has a flexible display that takes advantage of the high resolution iOS retina display. The CALC 1 display area can display 1 to 4 lines of values, key hints, and error messages (not error codes that you need to look up in the manual). The top line of the display shows the name of the current calculator. There are also two mode settings that will be displayed when they are not in the default mode. For the trig degree mode the default is radians so you will only see the mode indicator set when the trig mode is degrees. The time value of money end mode is the default and when in begin mode, the BEGIN status is displayed.
CALC 1 will display a hint when you press and hold a key. So CALC 1 does not need all of the hard wired indicators that a hardware calculator needs.
Most common options can be set in the Options view. CALC 1 uses standard iOS gestures for common options.
Many calculators will have a "DEC x" key to set the number of decimal places to a value. Otherwise this can be set in the Options view or pinching the display.
This can be done in the Options view. Calculators with trigonometric functions will have a "d/r" key to toggle between the default of radians and degrees.
CALC 1 uses the ISO 8601 YYYYMMDD format for entering dates. This is a common date format that most users around the world are familiar with.
For example, April 28, 2004 is entered as 40428. June 4, 2018 is entered as 180604.
If you omit the first two years (the century) of YYYY, CALC 1 will use the current century, 20. This is a common truncated representation.
If you omit the entire YYYY, CALC 1 will use the current year.
CALC 1 supports chain (CHN), algebraic (ALG) and Reverse Polish Notation (RPN) calculation methods.
Each focused calculator has a clear key designed for that calculator.
The "del" key will delete the last character when entering a number. If the number is entered, it will delete the number as a "CE" key would. If you are entering a number and need to delete the entire number and start over, tap shift clr x.
Since CALC 1 uses a automatic stack, there is a "clr s" key to clear the stack values.
The "clr m" key will clear the user memory. Instead of memories 09, CALC 1 uses az for memory labels that are easier to remember.
For all of the keys except the last character delete, you can undo the deletion with CALC 1.
When entering a number, the "del" key will delete the last number.
Shift, clr x will clear the x register in CHN and RPN mode.
Shift Clr f will clear the formula in ALG mode.
CALC 1 has many math functions for each Focused Calculator. See the help page for the calculator.
Instead of just 10 numeric memory locations, CALC 1 uses alphabetic variables az. This gives you more memory values that are easier to remember. CALC 1 also has many variables used by the calculators. Not all user (az) variables are available in every calculator. Some calculators will use the top rows for variables specific to that calculator. Also the Key Preview option makes it easier to tell what storage variables are available and
With CALC 1, the automatic stack and history list often make it unnecessary to STO numbers to use later. See Storing and Recalling Numbers for more information.
Enter a number (or use the existing value) and tap the STO button. The key labels will be updated to show the available memory variables. Tap the button of the variable you wish to use.
Since storing a value to a variable replaces the old value you can undo the storing of a value if you make a mistake.
See Storing and Recalling Numbers for more information.
Tap the RCL button. The key labels will be updated to show the available memory variables.
Then tap the button with the label of the variable you want to recall.
CALC 1 has memory arithmetic to add, subtract, multiply and divide to a memory value. See the documentation on register arithmetic for details.
The CALC 1 register arithmetic system can also be used to add, subtract, multiply and divide the displayed x value by a stored constant.
For the functions that worksheets provide, CALC 1 uses either a Focused Calculator or a Formula Calculator. The CALC 1 calculators allow you to store, recall and compute the required values in any order without having to "arrow" through a list.
Below is a list of worksheets and the CALC 1 calculators used for that functionality.
TI BAII Plus  CALC 1  Comments 

Time Value of Money  
Amortization  Financial Amortization Calculator  Also see the Amortization Form Calculator. 
Cash Flows  Financial Cash Flows Calculator  In addition to IRR and NPR, CALC 1 calculates MIRR. Up to 1,000 cash flows that can be easily edited and reordered using the List Manager. 
Depreciation  SL, SOYD, DB and DBX with starting month calculations.  
Bonds  CALC 1 has 5 different date basis and 3 frequencies.  
Statistics  Statistics: 1 List Calculator Statistics: 2 List Calculator 
List based statistics for 1 & 2 lists. Up to 1,000 cash flows that can be easily edited using the List Manager. List based statistics can calculate median, min, max that cannot be calculated with calculators that aggregate their statistics. 
Curve Fitting  Curve Fitting: LIN Calculator Curve Fitting: Ln Calculator Curve Fitting: EXP Calculator Curve Fitting: PWR Calculator 
Separate calculators for each type of curve fitting. 
Percent  Percent Change Formula Calculator Percent Change with Periods Formula Calculator 
Many calculators have %, Δ% (percent change) and %T (percent of total) keys for quick percentage calculations. The Math General calculator has percentage calculations. 
Interest Conversion  Effective Interest Rate Formula Calculator  
Date  DAYS Function Formula Calculator DAYS360 Function Formula Calculator 
The TVM and Bond Calculators have date keys for quick date calculations. 
Profit Margin  Profit Margin Formula Calculator  
Breakeven  Breakeven Formula Calculator 
CALC 1  Comments  

Currency Conversions  Currency Conversions Form Calculator  This performs conversions from any Focused or Formula calculator by tapping the CALC 1 logo. 
Conversions  Conversions Form Calculator  This performs conversions from any Focused or Formula calculator by tapping the CALC 1 logo. 
Customization  Customization 
