Just to show that even something so good can be unfairly criticised, I only wish that the terrain zoom-in was for the period rather than the modern geography {chuckles}. Because it's a battle I know well, I looked for Waterloo and on the map it took me an age to find Mont St. Jean and La Belle Alliance and I never did find La Haye Sainte .
I think it would be interesting to find an app that projects something as mundane as the weather for the same time frame. But then again, there are other factors that the small ice ages to prelude a massive war....