这个计算器的设计是为了帮助你做出小时和分钟计算和减法方便，快捷无需进入复杂的转换。
**English**
Our calculator is designed to help you add and subtract hours and minutes rapidly and without going into complicated conversions.
Handy and user friendly, you will be able to see your calculations as you write them down and thus not loosing the thread during long additions.
The App keeps all your calculations in memory after closing it.
You can calculate up to hundreds of thousands of hours.
You can easily convert hours in decimal for instance 2h30 = 2,5
With our Premium version you will also be able to divide and multiply your hours and minutes. The Premium version doesn’t have any adds.