Good tool conceptually but database is unreliable
The tool is not bad conceptually however I just checked out my home airport EDHL and three major frequencies were incorrect or at least imprecise. ATIS real 119,93 to NRST 119,925; Tower real 128,705 to NRST 128,7; GRD real 121,780 to NRST 121,775. This to me is quite unacceptable but should be fixed easily. Furthermore is the tool quite lean from the provided functions and settings however for the watch worth a try.