InReach
10 minute tracking and two-way communication, battery life about 100 hours (use when moving only it's good for a two week trip, bring a small powerbank and it's good for a month.
Flexible subscription options.
There are "similar" devices from SPOT, Zoleo and probably others. I use the In Reach so that's what I recommend. Second choice would be a SPOT, I'm not convinced about the Zoleo as it's smartphone required for some operations.
If tracking is the ONLY thing you want there are lower cost devices but for paddling I think the ability to communicate two-way is paramount.
If I have a stroke, I want a chopper IMMEDIATELY, If I broke my wrist and can't paddle but are otherwise safe and secure a pick-up in the next 24 - 48 hours would be fine and I'd be happy knowing help IS on the way.
I had to set off a SPOT (orginal model) emergency signal once, it was psychologically painful waiting and hoping that the message got through and help was coming. It wasn't until a Hercules flew over and dropped a radio that I was able to explain the situation and relay the message that it was not exactly a critical situation and waiting a couple of days for extraction was not a problem.
I carry the unit in my pfd pocket so it's with me in the boat and usually on the portage trail as well. On a solo trip I carry it with me even if I'm just going into the woods to collect firewood.