Digital Shot Timer
However you brew your coffee - espresso, pourover, clever coffee dripper - you need to use a recipe if you want a consistent brew. Time is one of the variables in your recipe that you need to measure and adjust as necessary.
Pulling a shot? Time it! Brewing a French press? Time it! Making a pourover? Time it! I could go on, but I think you get my drift... The CDN timer is one of the best available - reliable, clear display, and has a built in stand and a magnet. You can set the hours minutes and seconds separately for quick and accurate adjustment and it also counts up or down.
Oh, and it also reduces the chances of your iPhone drowning in a horrific AeroPress accident.