I had a look but I can't comment how good it is - which is where launching a site or web service becomes tricky. IMO, the site needs a fall back keyboard key to launch the query to get around a non functional script (for sending off the query.) I am probably the one in a thousand user who has an extensive deny list, which includes a handful of api services. No doubt it works ok for those who have the latest systems and a phone model that's only just been released.
Many years ago there used to be services that offered virtual browser / environments so developers could test as much as they could themselves but with the advent of smart phones made it just a bit too hard offer a comprehensive range.
Quick edit for clarity.