jefmcg
Guru
I was typing this and then stopped ... I guess you are committed now ,but If you are thinking of doing audaxes, you should get one with mapping.
I made an audax-friend on my first 200km, partly because his Garmin only did breadcrumbs and he lost the trail several times. I was using OSMAND on my phone, so he stuck with me.
Sure, you can use iPhone in a mapping emergency, but in my experience of audaxing, you want proper maps on your handlebars for the entire ride, and it doesn't really make sense buying a garmin, and then pushing it out of the way to squeeze an iPhone onto your handlebars, and still have the battery life problem.
I made an audax-friend on my first 200km, partly because his Garmin only did breadcrumbs and he lost the trail several times. I was using OSMAND on my phone, so he stuck with me.
Sure, you can use iPhone in a mapping emergency, but in my experience of audaxing, you want proper maps on your handlebars for the entire ride, and it doesn't really make sense buying a garmin, and then pushing it out of the way to squeeze an iPhone onto your handlebars, and still have the battery life problem.