Be careful: This app is only useful for you, if you have an Android watch. The phone app doesn't provide any functionality.This Android wear app shows the chemical elements of the periodic table. Starting with Hydrogen you can continue with a simple tap in the middle of the screen. Before you do that, you should think about the name of the following element... Got it? Helium! Tap and check whether you were right. Continue like that until you reach Oganesson which is number... Correct: 118!
This technique helps you to remember the elements. You can see the overall progress and the current time (remember, you are doing all that on your watch) while you are learning.