https://techcrunch.com/2018/05/24/hitlists-new-premium-service-puts-a-travel-agent-in-your-pocket/

Hitlist, a several-years old app for finding cheap flights has begun rolling out a subscription tier that will turn it into something more akin to your own mobile travel agent. While the core app experience which monitor airlines for flight deals will continue to be free, the new premium upgrade will unlock a handful of other useful features, including advanced filtering, exclusive members-only fares, and even custom travel advice from the Hitlist team.

The idea, says founder and CEO Gillian Morris, goes back to the original idea that inspired her to create Hitlist in the first place.