PrefixCalc vs VisualTimer byNSDev

This calculator supports Metric‑prefix such as kilo and giga. The calculator supports quetta (10^30) and quecto (10^-30), which were added in 2022. Main Functions ・Support for arithmetic operations (+ - ×÷) ・Results converted to Japanese numerals for display ・Delete one character at a time with the "DEL" button 　Press and hold to delete all ・Press and hold to copy calculation formulas and results 　English (Short scale, Long scale) and 　Chinese numerals can also be selected. ・Calculations that include prefixes such as 2M+1k, 2M×1μ, etc. Note: ・Very large numbers that exceed 200 digits may be rounded off for display and calculation purposes. 　Please note this when precision is required. ・Short scale and Long scale are currently supported up to 10^198. ・Kanji notation is supported up to 10^72. 　If it is greater than the number, it will be displayed in Arabic numerals.

Tap the time text to enter editing mode. Tap the time text again to enter execution mode. The following settings can be changed: * Tap the time bar to change the foreground and background colors. * Change the number of divisions in the time bar. * Adjust the size of the time text. * Save and load settings. * Count up and count down. * Adjust the vertical and horizontal movement of the time bar. * Turn the sound on/off at the end. Use the slider next to the time bar to test the operation and adjust the start position.