Cab drivers and bikers tap away furiously on their mobile phones as they wait at red lights in the Iranian capital during an early June heatwave. A wider crypto craze aside, the app's rise in Iran highlights a harsher truth facing the Islamic Republic ahead of Friday's presidential election to replace late President Ebrahim Raisi, who died in a helicopter crash in May: an economy hobbled by Western sanctions, stubbornly high inflation and a lack of jobs.
