Chronometer and Countdown vs PROG_CALC

“Chronometer and Countdown” turns your iPhone / iTouch into a stopwatch and/or countdown timer. Useful in sporting competitions or during athletic training to measure athletic performance, in motor racing and wherever it is necessary to use a stopwatch and/or countdown. Features: - The stopwatch and the countdown can be executed together - Chronometer - Interruption and resumption of the stopwatch counting - "Lap" for measuring the arrival of two subsequent events - Countdown time adjustable manually (using the numeric keypad of the device)

The programming calculator provides two modes of operation. It has built-in basic operation functions, syntax parser, and supports a variety of application scenarios. 【Basic calculation】 Basic mode provides basic calculator functions for daily computing applications. 【Mathematical function】 Built-in rich mathematical functions, easy to implement basic calculations. 【Variable Storage】 Provides variable storage function, can store intermediate calculation results in basic mode, import and export with one key during application, and edit mode provides variable browsing function to easily grasp calculation results. 【System conversion】 Support binary, octal, decimal, hexadecimal conversion to meet the computing needs of different platforms. 【Code Example】 With built-in code writing examples, you can easily learn computing methods and expand application scenarios. 【Code Sharing】 The code can be shared through a QR code or a file, and the application also supports reading files directly, or scanning a QR code, which can be written on a computer and applied on a mobile phone.