App: Time Calculator Simple&Easy
Developer: YOSHIHIRO NAKAJIMA
Genres: Dienst­programme, Produktivität

A calculator app that is good at calculating time.





version 1.7

- The last unit "Second" following "Hour" or "Minute" can now be omitted.


version 1.6

- This app enhanced that in order to put calculated your result back to a number for math. 

 For long tap on hours/minutes/seconds buttons.


version 1.5.2

- Supported physical keyboards (external keyboards) for iOS/iPadOS 15.


version 1.5

- You can now tap the number buttons immediately after launching this app.


version 1.4

- Supported physical keyboards (external keyboards). (iOS 14.0 Later)

app keypad  ->  keyboard
-----------     ---------------
0 - 9 | .           0 - 9 | .
d | h | m | s     D | H | M | S    
+ | - | × | ÷     + | - | * | /
=                     = | enter | return
C/AC               C | esc
←                    backspace | delete

copy expression to clipboard       ⌃C | ⌘C
paste expression from clipboard  ⌃V | ⌘V
re-size (only for iPad, Mac)          ⌃R | ⌘R 
show/hide history view                 ⌃H | ⌘H


Version 1.3

- Enabled to enter a decimal point.
    ex) 8h - 7.75h = 15m


Version 1.2

- In the unit conversion after calculation, two types of results are displayed.
    ex) for "m"(minutes),  1h 25m 2s -> 85m 2s -> 85.033m
        (Switch each time you press "m"(minutes))


Version 1.1

- This app saved the formula history as a calculation result. And you can reuse it.

- This app enables multitasking with Slide Over and Split View for iPad.


◆Useage

There are four types of units to handle: days, hours, minutes, and seconds.
The unit days, hours, minutes, and seconds are each represented by one letter. It corresponds to the button on the calculator.
 "d" : days
 "h" : hours
 "m" : minutes
 "s" : seconds

The following four arithmetic operations can be used to calculate the time. Remember to enter the unit.

1. Addition　ex) 1h 25m + 2h 10m = 3h 35m

2. Subtraction　ex) 1h 25m-2h 10m = -45m

3. Multiplication　ex) 1h 25m × 3 = 4h 15m
   (The multiplicand has no unit)

4. Division 1　ex) 1h 25m ÷ 3 = 28m 20s

5. Division 2　ex) 1h 25m ÷ 28m 20s = 3.000
   (Fixed to three digits after the decimal point)

Of course, you can also calculate continuously like a normal calculator.
ex) 1h 25m + 2h 10m - 58m = 2h 37m

You can also convert units to days, hours, minutes, and seconds.

　ex）1d 2h 3m 5s = s        93785s　(to seconds)
                   m      1563m 5s　(to seconds and minutes)
                   h     26h 3m 5s　(to hours and seconds and minutes)
                   d   1d 2h 3m 5s

Press the same unit key to switch the display.
(Fixed to three digits after the decimal point)

　ex）1d 2h 3m 5s = s　s   93,785.000s　(to seconds)
                   m　m      1563.083m　(to minutes)
                   h　h        26.051h　(to hours)
                   d　d         1.085d　(to dayss)

Forgetting the unit can result in errors.
In that case, press C (clear) or ← (backspace) button to correct.

　ex) 120s + 32 = Error
　　　　　　　← s = 2m32s
　　(120s + 32s = 2m32s)


The display of this app has two rows, the calculation formula is displayed in the first row and the input data or the calculation result is displayed in the second row.
When you start the app, the current local time is set on the second row of the display. (Format is "24h59m59s")

Tap the display of this app to copy the contents.

The function of the CLEAR button depends on the number of times it is pressed continuously.
The first time is cleared second row of display, the second time is cleared first row of display.
For the third time, the current local time is set in the second row of the display.

- This app enables to light and dark styles.

- This app can be resized for only iPad.

- Enables device rotate for only iPad.


Please use it conveniently.

Release notes:
The last unit "Second" following "Hour" or "Minute" can now be omitted.