I have used the Inreach. Expensive but highly accurate and the wife really likes that I can text her or she me. Note that it can take up to 20 minutes (usually around 10) for each round trip message (question then response) though so ensure all your questions and answers are thought out. Depending on the plan you select, you can track as frequently as 2-minute intervals.
It also has a cool map that tracks where you have been/are showing the speed and elevation. It is highly accurate. Once, I went off the road for a "nature break" and she wondered if I had wrecked or something since it was 20+ feet off the road. The battery life is pretty good. Two AAA rechargeable batteries last about 5-6 days on the 10-minute tracking mode assuming I turn the device off at night.
Consider where you tour is going. If you will have cellular data service fairly often (say along the coast), I "think" you can get phone apps that will do the same thing. However, if you do more remote touring, i.e. Great Divide, northern central plains, Alaska, etc., then a satellite tracker may be the way to go. All depends on what you need.
My big gripe with the InReach is that you have to pay $25/year for the "subscription renewal" in addition to any plan. Plus if you use the freedom plan (month to month), you have to pay $25 to start the plan again each time. So in other words, you go on one 1-month (or less) tour a year, it is $50 plus the plan cost and then you can cancel the plan. If you did say, two separate 1-month tours a year, it would then cost about $75 plus the plan costs assuming you cancelled the plan between the tours. Considering all this is automated through the website, I think that is a bit steep.
However, for me, since my lovely wife wants to be able to get a hold of me no matter where I am, I am unfortunately forced to keep it. Otherwise, I would seriously consider the Spot.