Well, the good news is that a simple gesture from the left edge can call up any app on your smartwatch, from any page. But you will need to first install the Wear Mini Launcher from the Google Play Store, to make it happen. With this app, you can swipe in from the left edge of the timepiece, and scroll through the list of apps on the watch.
In a loud area, voice control isn't perfect, and who wants to scroll through pages until they reach their desired app? This would seem like a perfect solution for those who plan on using numerous installed apps on their watch. And at the low, low price of "free," you are going to be hard-pressed to find a better deal.
source: WearMiniLauncher via AndroidPolice