Apps like yours are promising, good luck to you.
Is Denmark mostly flat land? Ideally altitude changes should factored in, along the chosen route.
I like the weather data tie in feature.
Tying in tire pressures would be helpful.
You'd need a units conversion for the States.
'12 SL last reading @ 2 yr, 22k, 260 GIDs, 62.35 Ahr
'15 SV w/QC, Mfd 5/14, Leased 8/14, 292 GIDs, 64.38 Ahr when new
@ 25 months, 25k, 267 GID, 56.88 Ahr
@ 29 months, 29k, 286 GID, 60.88 Ahr
@ 31 months, 30.3k, 274 GID, 58.39 Ahr6.72 kW Array