InterActiveCorp (IAC) has reported higher-than-expected quarterly profits as subscription revenue from its online dating interests -which include Tinder, Match.com, and OkCupid - rose over the last three months.

The company says that the performance of the paid-for version of Tinder has been particularly strong, and beat the group's original forecast.

Revenue from its dating websites increased by 2 percent in the first quarter of 2015 - excluding the negative impact of the strong dollar this revenue rose by 8 percent. Its number of paid subscribers grew by 16 percent.

Last month an analyst note from JMP Securities estimated that Tinder will grow to be worth $1.6bn, despite its limited number of revenue streams. Tinder subscriptions could gross $121m by 2016.

The premium 'Tinder Plus' service allows users to 're-swipe', browse Tinder in other countries, and have unlimited likes - while regular users are limited to a certain amount of right swipes.

The social dating app's latest update integrated Instagram feeds into users' profiles.

IAC has a massive portfolio of online businesses, including brands like Vimeo, College Humour and Ask.com.