Hello,
Since its not possible to find ILS, VOR and NDB frequencies in the sim map as we were doing previously in FSX I have developed an app with a world airport database that contains all the info missing (i.e. ILS frequencies, runway course, approach minimums, navaids associated with an airport and much more)
Here below is the link. Feel free to comment. Thanks!
https://play.google.com/store/apps/details?id=com.mobilesportapplications.airportroutemanual
https://www.youtube.com/watch?v=bTWKIJrS8ig