You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
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One notable bug fix is the "missing blue line" on the Nav map when a destination has been set. Portion(s) of the active route were not always displayed. Especially bad when the map was zoomed to small scale. Fortunately this updated fixed that bug. (2013 "Classic" S85 sig)