I just start a timer on my phone?

I have one for both my dryer and my washer.

I load the washer then start the timer, when it goes off I just load it in the dryer then start the other timer.

It’s super easy and it’s no effort at all.

I had an old wind up kitchen timer with writing on it for a while but I missed it a few too many times so I switched to the phone timers.