Originally Posted by
adamrice
Waterproofing is a pretty common feature on phones these days. I use my phone as my bike computer in all conditions, without a waterproofing case.
Ditto. Modern IP67+ rated phones will have a marginal if at all disadvantage compared to a cycling computer. After all, the devices tend to all be tested to the same standard. However, a cycling computer does tend to fare better when they're roughed up in a crash or dropped.