The information gleaned from the app has helped me recognise whats flying overhead. When i was younger i was a huge plane spotter and could tell every type apart, its harder in the modern era where the basic template of a metal tube with an engine under each wing has been used for the majority of airliners these days. However thanks to the app i am starting to tell my 757s apart from my A321s...
The variety of what flies overhead surprised me a bit actually. I knew there were a lot of 737s and A320s but the number of 757s was a surprise, plus the odd A310 and 777. High up has been even more of a surprise, i often assumed the faint specks that fly high overhead were all big transatlantic jets but although i have seen a few 747s and an A380 many of the specks are smaller planes flying from the likes of Edinburgh and Shannon to airports in the South.
Great app anyway, i always have it open if i've got the iPad in the garden. Its just a shame not every plane shows up on it. You can see some photographs i've taken of planes flying over my house over the years here.