Travel by car-maps

Download Google maps for offline use so that wifi isn’t necessary. We navigated all over the island that way with no problems.

What Tom said. I've used maps.me for trips to Spain, France, Scotland and Italy.... works like a charm
Brad

I pre-mark all my destinations on Google Maps and then download for offline use the destination. With the locations pre-saved, it’s easy to plug in directions without data or WiFi. Google maps did great for me in Ireland in 2019. Don’t forget a mount for your phone if you plan to do that. I have never had one come with a rental car but it sure is nice to have.

Google maps worked great for us too. Simply select your route when you have mobile data or WiFi, then turn mobile data off to navigate - uses hardly any data at all. Try it at home to familiarize yourself with how to do it, but it really couldn't be easier.

I have both a Garmin and Google maps downloaded for offline use. I use the Google maps for those really small out of the way places not on my Garmin maps. Remember to put you phone into airplane mode when using them so your phone turns into essentially a GPS unit and doesn’t use any data.

I used offline Google Maps and iPhone Airplane mode in Ireland. Works great!
A few suggestions: Check the route, use the big roads. We were once directed across a farmer's field instead of the straightforward main highway. Target a public parking lot in the center of town rather than the address of the pub. You will not want to parallel park a strange car on the wrong side of the street while shifting with the wrong hand and looking over the wrong shoulder. Municipal parking and a short walk is far less stressful. If possible, have someone else navigate while the driver concentrates on staying on the correct side of the road and avoiding the rock walls, etc.

Tom_MN brings up a good point about using common sense with a GPS. On one occasion in Spain. the GPS had me going through a field to get up to a castle rather than going up the hill on a normal road. On another occasion the GPS tried to take me on a non-existent road that supposedly ran parallel to the highway. There are times when a GPS is simply wrong and one must use common sense to get to the destination.