The usual pricing for TomTom on smartphones is over US$100.
However, I think one of the reasons Apple announced the addition of monthly subscriptions to the App Store, is for programs like this:
Who would pay $100+ outright? Few. But how many more would sign up for a $5-10 monthly fee, especially if presented as say, $1.99 a week.
where does this gps fee idea come from? My family has probably owned about 10 different GPS devices from all different brands and I've never heard of a monthly fee.....