"PlankTimer" is a very useful gadgets. Users only need to use one finger up and down on a sliding scale hourglass, you can easily set the countdown time, as shown below. Then click "START" to begin the countdown.
"PlankTimer" is a very useful gadgets. Users only need to use one finger up and down on a sliding scale hourglass, you can easily set the countdown time, as shown below. Then click "START" to begin the countdown.