iphone instead of gps

Just downloaded an iphone ap called trails for $4.95

Will test it this week but it looks like it records where u start, go and finish including waypoints, photos of waypoints using the phones camera, all using the phones existing gps
Maps can be imported as well

Another package for iphones is navionics which is a very high quality marine mapping package - normally $300 but only $30 on an iphone
Uses Google earth and google maps on land-also gps not internet

I'll test it to confirm but if so one less thing to carry and a lot cheaper

Eats batteries tho so only good for checking on position and putting in waypoints /photos

wondering how you found the trails app rangirocks?
what is the scale like? and is it australia wide,
thanks
GM