An app that might be of interest to those who are taking a flight over the next few months - I've stuck it on my phone for July.
Flyover Country is designed to help people recognise what they are flying over. It picks up a series of POIs (Points of Interest) which can then be viewed offline.
The level of detail varies depending on your location, and there may also be some variation in your actual flightpath from the route that is automatically marked in when you choose your start and finish points, but the concept is good, and the fact that it works offline is obviously important (unless you fly with an airline like Norwegian which offers free wifi)
Details on this CityLab post.
Thanks to Bob Lang for the tipoff.