So, that's me ... [emoji6]
I used abrp last weekend and I'm still not quite sure what to think about it in terms of en route usability.
It is only a website, there is no app or Android auto interface. So you have to use your phone to navigate. I used to do that in my old Toyota Corolla, but now in my Hyundai I want to use the middle console screen and/or the HUD. I want my phone to be stowed away (distraction free driving).
The developers are great with all the data etc. that's calculated in the background, but it is not an intuitive interface that's easy to use while driving. It might work better in a Tesla with the big screen and the internet connectivity, but on a phone screen not so much.
That being said I tried to use abrp anyways, to test it. Once you are on the road it actually switches into a different mode and you can update the SOC manually (with up/down arrows that appear once you drive).
It will then update the driving info based on the new data. So apparently that (and your current speed) will be done automatically by using an obd2 reader.
However, I find it still kind of a clunky interface and distracting. So much that I personally wouldn't want to use it while driving.
My personal conclusion is to use it for planning purposes only.
However based on my test on using it while driving I would think that an expensive obd2 reader that updated every second vs a cheap one that updates only every 30 second or even less will not make any difference on your navigation experience. In the end, how much does it matter if you recalculate your SOC and speed every second or even every minute, or even every 5 minutes? So IF I would use an obd2 reader I would definitely start with a cheap one and see if I like the navigation experience in general. If at some point - or ever - I feel like it's not enough data, I would probably upgrade to a more expensive one.
So, obviously it's your decision, but that's my two cents. I feel like the navigation experience with Google maps is A LOT better than abrp. Like, which lanes to take, traffic info, named roads, voice navigation, to name just a few. Even the Konas built in navigation is better and I'm not even a big fan of that because of its outdated roads and chargers.
I hope this helps.
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