My wife and I had our flight from Europe to Japan cancelled a few summers ago. The put us another flight via Bangkok. Added 8 hours to our journey. That became

My wife and I had our flight from Europe to Japan cancelled a few summers ago. The put us another flight via Bangkok. Added 8 hours to our journey. That became a really long trip. Eventually we got the EU paperwork and filled it in meticulously. And to our surprise €600 each arrived within a few weeks. As soon as the use of these type of apps become the norm the flight prices will probably go up a bit to compensate. Or maybe the airlines will be less cavalier about cancelling flights.