ExprEval vs Extended emulator of МК 61/54
Side-by-side comparison of two open source alternatives
ExprEval
Application that solves math expressions. Main features: * Supports variables (e.g. you can do "a=5", then "a+1" and you get 6) * Built-in basic function (like logarithms and trigonometry) * Custom functions can be defined (e.g. "log(x,b)=log(x)/log(b)", then log(32,2) will print 5) * Variables and functions can be edited both from the prompt and dialogs * Can print parsing and evaluation steps. * (Android 6.0+ only) can evaluate expressions from text selection in any application (ACTION_PROCESS_TEXT intent). * Fully localizable - actually includes English and Italian, you can contribute yor translation with a pull request on GitHub. Changelog: * 1.2: updated build tools to fix crash on some Android versions. * 1.1: added localization support and Italian translation; added ACTION_PROCESS_TEXT intent filter. * 1.0: Initial version. This application is based on this open source (MIT licensed) library.
Extended emulator of МК 61/54
МК 61 was the best seller of all USSR programmable calculators of 1980-s (B3-34, MK-54, MK-56, MK-61, MK-52). Calculators are emulated on microcode level so they behave exactly like the original devices, including all non-documented features and inaccurate calculations. For ease of use application features saving and loading emulation states. This app's emulation engine Java code is based on C++ source of Felix Lazarev's emu145 project. Emulation was highly optimized for speed and should run in real time on any phone. It's an extended version of the original emulator МК 61/54 by Stanislav Borutsky (https://play.google.com/store/apps/details?id=com.cax.pmk). This version allows to export/import programs from external files and contains some UI improvements. Hint 0: you can found the list of all tips in the About dialog Hint 1: touch calculator's indicator to toggle slow/fast mode. Indicator's blinking looks better in slow mode. Hint 2: you can choose between MK-61 and MK-54 using menu option that becomes visible when calculator is switched off. Hint 3: with the menu "Import" you can import programs from external files, several such programs you can find in https://xvadim.github.io/xbasoft/pmk/pmk.html Hit 4: you can open menu by long tap on the "Вкл" label.
| Feature | ExprEval | Extended emulator of МК 61/54 |
|---|---|---|
| License | MIT | GPL-3.0-only |
| Install sources | F-DroidGitHub | F-DroidGitHub |
| Categories | CalculatorProductivity | CalculatorProductivity |
| Features | Ad-FreeOpen SourceNo Tracking | Ad-FreeOpen SourceNo Tracking |
| Platforms | Android | Android |
| Website | ||
| Source code |