A Garmin Edge model with built in OSM (8xx/1xxx models) are absolutely phenomenal at this with no mucking around with apps or any cell service required. I thin

A Garmin Edge model with built in OSM (8xx/1xxx models) are absolutely phenomenal at this with no mucking around with apps or any cell service required. I think it's what almost all very serious cyclists use. I've done 150 mile turn by turn routes on my Garmin. I've had various models for near 20 years of cycling. The only time ironically they ever have trouble is if you download a route generated by one of the various apps on the internet.. you need to be quite careful with those. The on the fly routes they generate don't ever have those issues. When they started using the Garmin curated version of OSM it was a massive upgrade. Near me it's very near 100% coverage even of mountain bike singletrack trails through the woods. OSM has gotten incredibly good for cyclists. If you are not a road cyclist OSM has amazing coverage of bike lanes & paved paths too. And you can actually see it in the sun and don't need to carry a pocketful of USB powerbanks to make it to your destination. The only people who need to recharge with a powerbank are the .01% who ride more than 150-200 miles without stopping at a place to charge.