Ciao Marcodema, benvenuto nella Community Samsung! 
La disponibilità delle applicazioni di terze parti da installare sull'orologio può variare in base al dispositivo a cui connetti lo smartwatch e al sistema operativo installato, per cui è possibile che non tutte le app siano presenti.
Prova a fare una ricerca direttamente su Galaxy Store scrivendo "navigatore".
Attendiamo comunque i feedback di altri utenti che utilizzano lo smartwatch col proprio iPhone 
Ciao!
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