The author lists everything his phone has replaced, and the two items his phone cannot replace yet. One of those is a radar detector. To that I offer the Waze app. While it is not exactly a radar detector, it still serves the same purpose.

Funny story. I first heard of the Waze app while reading a Car & Driver magazine in my doctor's office nearly 15 years ago (possibly before 2010). There was an article on illegal cross-country car racing. One of the drivers said something like, "I use a combination of radar detector and Waze to avoid the police."

I had no idea what Waze was, and researched it as soon as I got home. It has always been crowd-sourced, and there were not many users back in those days (at least in my area), but I used it and spread the word anyway,