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TCalc is time calculator.
TCalc has 6 time modes. (h:m:s h:m h m:s m s)
You can change time mode.

You can calculate
Time + Time
Time - Time
Time * value
Time / value
by TCalc.

Max is 999999.999999.
If value is over the max, it displays OVER FLOW.
Please Tap AC.

Tap Display ---> History
Double Tap Display ---> History Clear

Sound ON/OFF
Display Hold(Not Sleep) ON/OFF