Phones and tablets don't have mice, so clicking options vary. This is an important thing to keep in mind because not all devices are created equally. When it comes to touchscreens, there is two kinds—capacitive and resistive touch. Capacitive is what you will experience with most modern devices, and you interact with the screen simply by touching it. Resistive, on the other hand, requires that a certain level of pressure is applied, such as with a stylus.