Wall climbing and bouldering are both forms of indoor climbing, but they differ in terms of height, rope usage, difficulty, style and safety. Indoor wall climbing typically takes place on taller walls and requires the use of a rope and sometimes a belayer, whereas bouldering is typically done on lower walls without a rope and relies on crash pads and a spotter for safety. Bouldering is a test of power and strength, whereas wall climbing is more about endurance and stamina.