How is this feasible long term to sustain it if its 100% free? As if you are doing any advanced flight tracking similar to Flighty or 2Flights and you'll end up eating API costs. Unless if its being scraped from other online vendors.

Added a flight and it shows beautifully.
Forwarded a hotel and honestly I love the UI and how well it shows some key information.

I will deffo keep an eye on this as the overall UI is amazing. A phone app is deffo needed though!