A counter that can count the numbers you want to make▶ Introduction to basic usage ◀⯀Raise the numberPress Volume ↑ key⯀ResetPress Volume ↓ keyHowever, the initialization method may vary depending on the settings.⯀SettingsSettings can be made by pressing the gear button at the bottom.⯀Change current numberSettings can be made by pressing the pencil button at the bottom.▶ Introduction to settings ◀⯀Vibration timeSet the time to vibrateUnit is ms⯀Reset timeCan be set when [Initialization mode] is Auto and [Volume ↓ key function] is Make to 0Set the time it takes to initializeUnit is ms⯀Reset modeCan be set when [Volume ↓ key function] is set to ‘Make to 0’Set initialization method to automatic or manualAutomatic: Automatically reset to 0000Manually: Press each button to reset to 0000⯀Volume ↓ key functionSet the function when the volume down key is pressedMake to 0: Initialize to 0000Subtract 1: Subtract 1⯀ThemeSet the background color of the apps screenWhite: Default wallpaperDark: Wallpaper in black and gray⯀Vibration IntervalAdjust the interval between numbers that vibrateFor detailed explanation, please refer to ▶ Vibration Interval Description ◀⯀First number of vibrationSet the first number to vibrateFor detailed explanation, please refer to ▶ Vibration Interval Description ◀⯀Screen buttonControl by touching the screen by adding invisible up and down buttons on the screen⯀Screen button ↕Can be set when [Screen Button] is ‘On’Swap the up and down functions of the screen buttons↑: The button above is the button to increase the number (the button below is the reset button)↓: The button below is the button to increase the number (the button above is the reset button)⯀Reset to default settingsCan be reset with the top right button(Be careful because it cannot be reversed)⯀Save settings and exitYou can save and exit by pressing the check button at the bottom.▶ Change current number ◀⯀Top button functionAdd 1 to the number in the middle(The number changes to 0 on the 9th)⯀Bottom button functionSubtract 1 from the number in the middle.(If the number is 0, it changes to 9)▶ Description of vibration interval ◀⯀Description in writingCreate an arithmetic sequence in which all terms are numbers that vibrate between 0 and 9999.The tolerance of this sequence is put into the vibration interval, and the smallest term in this sequence is put into the first vibration number.⯀Explained with mathLets say the vibration interval is I, the first number of vibrations is F, and the number of vibrations is V.(N and Z refer to the set of natural numbers and the set of integers, respectively)I ∈ NF ∈ Z, 0 ≤ F ≤ 9999V ∈ Z, 0 ≤ V ≤ 9999F ≡ V (mod I) and F ≤ V.⯀ExampleVibration when even number 2 4 6 8 10... Oscillation interval: 4 - 2 = 2 First vibration number: 2Vibration for odd numbers 1 3 5 7 9... Oscillation interval: 3 - 1 = 2 Vibration first number: 1