LittleGray Calculator vs DB40X

LittleGray Calculator-Infinity is a high-precision large number scientific calculator that supports real-time calculations of custom functions and expressions. The columnar display window allows you to intuitively view the calculation process and calculation results of expressions. A variety of button layouts allow You quickly swipe to switch between the simple keyboard and the all-purpose keyboard. LittleGray Calculator-Infinity allows you to copy expressions from anywhere to the expression bar and modify the expressions by editing. It can also automatically generate historical records through the regular "=" sign of the calculator, and you can copy the parts you need in the historical records to The expression bar is recalculated. LittleGray Calculator-Infinity features: 1. Columnar layout 2. The column display window is displayed in multiple modes, and the size of the column window can be switched by clicking the column display window three times 3. Support large number calculation function, up to 9999 factorial and 9999^9999 power. 4. Unlimited display mode of large integer digits. 5. Support the four arithmetic operations of arbitrary precision of addition, subtraction, multiplication and division, and the maximum division is reserved to 1000 digits after the decimal point 6. Custom function formula function, functions can be classified. 7 multiple key modes: simple keyboard, function keyboard, hexadecimal\logic calculation keyboard, the keyboard can be switched by sliding left and right 8. History record function 9. iCloud cloud synchronization function 10. Real-time voice function 11. Multiple button color matching 12. More functions are waiting for you to discover

DB40X is a high-precision scientific calculator compatible with DB48X and inspired by the legendary HP48 series from Hewlett-Packard. It is not an emulator, but a redesign from scratch, which is faster, and delivers never seen before capabilities like computations in arbitrary precision. Like the original HP48, DB40X supports an unlimited stack, RPN and algebraic operations, complex numbers, based numbers, vectors, matrices, text, symbolic computations, numerical solving and integration, graphing and plotting, statistics, engineering units, and well over 1000 built-in functions. DB40X adds several HP50G capabilities, including a library of equations and constants covering mathematics, physics or chemistry. Using modern technologies, DB40X goes well beyond the original HP48 in many ways: - It is significantly faster, uses less memory, and features a higher-resolution 240x400 pixels graphical display. - Integer and decimal values can have an arbitrarily large number of digits, so you can compute log(pi) with 200 digits in a few keystrokes. - The six function keys feature up to three function per key, giving quick access to up to 18 related functions at a time. - Complex numbers can mix and match polar and rectangular form. - Symbolic operations extend to complex numbers, vectors and matrices. - Based numbers can be in any base from 2 to 36, and support any number of bits, making it easy to emulate a 23-bit or 512-bit processor. - Text is represented using Unicode instead of the proprietary HP encoding, facilitating data exchange with the rest of the world. - Multiple graphs can be distinguished using bitmap patterns. - Engineering units include all the modern evolutions of the SI system, and can be configured by the user, e.g. to integrate currency units with the exchange rate du jour. Converting between USD/hour and EUR/day has never been so easy! - A built-in hyperlinked help system documents functions simply by holding the corresponding key, and combine a quick start guide, a user manual and a reference manual. DB40X will run many user RPL programs as is. However, since it is not an emulator, it will not run any HP binary object, and notably will not run HP48 games or anything involving system RPL. Version 0.7.14 is an early-access release. Please consult https://github.com/c3d/db48x/blob/stable/doc/5-Unimplemented.md for a list of HP48 commands that are not yet implemented. DB40X is part of a family of compatible RPL calculators that include DB48X and DB50X. DB40X lacks the ability to write programs or data to disk, and RPL programs are limited to 40K.