2.9
2024-01-13
• Internal optimizations and cleanups.
• Modified Info screen to avoid clipping by the Dynamic Island.
2.7.2
2023-01-09
Like on a real HP-55, executing SST on step 00 simply ends any user input value.
The next SST will execute step 01.
2.6
2022-04-09
• Change the program listing font with a simple tap on the new button "F"
• Apply a filter to quickly find any program.
• Sample Programs may be hidden in the list of programs.
2.5
2021-10-05
• Improved sample program "Solve f(x) = 0"
2.4
2020-12-15
• Improved mail subject when mailing a program as PDF
• New sample program "TVM - Solve for i"
• Visual feedback when reloading programs in file list view
Bug fix:
• GSB command could not be pasted as text in PRGM mode
2.2
2020-09-16
• n! now appears as x! in advanced mode to reflect the fact that the function can handle non-integer arguments.
• Added and updated sample programs. Be sure to tap "Reload Sample Programs" in program list.
Bug fixes:
• Fixed a bug occurring when single-stepping a programmed number input
• Automatic mode switching based on the loaded program didn't work as expected in some cases
2.0
2020-01-25
• Improved stack display (swipe display right to show):
- Shows unformatted values of x and Last x
- Long-press to directly call up the register view
- Correct digit entries by swiping left
• Email programs directly from the program list
• Decimal points now occupy a full digit position.
• In Vintage mode, non-zero values less than 1 are now shown without a leading zero, as does a real HP-55. In addition, numbers may be entered with leading zeros.
• In 12/24 hours timer modes, tap ENTER to switch between time and date with weekday display.
• Programs now always stop after a step 99 (instead of continuing at step 01)
• Single-stepping on number input ends input mode
• Replacing registers by pasting a program into the display is now optional
• Support for iOS 13: Dark Mode, file sharing
Check out the new Download walk-through on the website (under "Sharing".)
Bug fixes:
• Executing the summation command ∑ with a very large argument would cause a crash
• Automatic address correction would produce values larger than 99 in some cases
RPN-55 SD now requires iOS 11 or later.
1.2
2019-08-14
• Improved LNx! function:
- Higher accuracy
- Now returns y and z such that x! = y * 10^z (where z is an integer)
• Program added: "Exponential & Log Curve Fit"
Bug fix:
• Sharing could cause a crash
1.1
2019-08-12
• Optionally replace unit conversions with additional functions (in Settings)
• Added "x-estimate" for a given y to linear regression functions. Note that the key for correlation coefficient (r) has moved one row up.
• Programs saved in vintage mode are now marked with a "V" in the listing view.
• Added programs "Hyperbolic Functions", "Gamma Function (Toth)", "Solve f(x)=0", "TVM with Unknown Interest" as well as all test statistics programs from the book "HP-55 Statistics Programs".
• Tight program loops with many repetitions will no longer cause the display updates to slow down.
Bug fixes:
• Pressing EEX when a number showing separators was displayed would not remove the separators
• Touching a main register value would not dismiss the register view
• The % function showed as 1/x in program listings
• Deleting a range of steps using g CLP in RUN mode could modify unaffected branch commands