The apps I use are:
Ptoolbox, Aeroweather, Iports.
Ptoolbox pretty handy for the conversion of Chinese/Russian meter levels to Feet. I know the're on the charts as well, bus just a handy tool.
Also the H.O.T.and runway report decode tool is nice to have nearby using the PToolbox.
Always as a backup for the real books okay ;-)!
N.
