The researchers examined how using smartphones can influence sports betting by young adults. The researchers interviewed 33 Australians aged 19–29 years. These participants bet regularly on sports, esports, and/or fantasy sports. The researchers identified seven major themes. The themes included platform functionality; sourcing betting information; physical accessibility; financial accessibility; social influences; privacy; and marketing. The researchers created a model that shows how features of smartphones, online gambling, and betting apps combine in smartphone betting. This provides instant access to betting anywhere and at any time, which can lead to harmful betting behaviours. Such behaviours include increased betting participation; increased frequency and spending; placing a wider variety of bets; impulsive and spontaneous betting; placing riskier bets; chasing losses; and acting on social encouragement to bet.