Spotify said on Friday its U.S. app update has secured Apple's approval to show pricing information and external payment links, days after a judge barred the iPhone maker from charging commission on off-app purchases. Shares of Spotify, founded in 2006 in Stockholm, were up more than 6 per cent in morning trading. The Swedish streaming giant, along with several other tech firms, had been at loggerheads with Apple over its App Store policies, which required developers to pay a commission on in-