Given a reference text about the Annapurna Post, tell me when it launched its online news portal and when it became successful.

Context: Annapurna Post is a daily broadsheet newspaper published in Nepal. It started printing in 2002 and launched its online news portal in 2013 by Annapurna Media Network, which also owns The Annapurna Express, AP1 TV and Radio Annapurna Nepal. By the 4 April 2014, its online news portal was listed among 10 most visited news portal in Nepal. It also launched its own mobile news app by 2018.

In the annual newspaper classification report 2073/2074 BS by Press Council Nepal, this newspaper was categorized in the A category, the second highest possible rank below A+.

Answer: Annapurna Post launched its online news portal in 2013. By April 2014, it became among the 10 most visited news portals in Nepal.