Mine is from Abbot Labs. There is no phone app for my model. My sister had one from some company called Medtronics and does have a phone app. I was sent this huge transmitter to put on my nightstand. It supposedly reads my pacemaker during the night and sends reports to some lab. I have no idea what they do if they didn't like what they would see.
I find it unusual that the manual for mine doesn't mention anything like the power tools or overhead lines you mentioned, although friends have mentioned the same things. My doctor's office or surgeon's office haven't said anything either, other than not lifting my arm above my head. Being diabetic, I tend to heal more slowly, so when they tell me 4 weeks for something, I tend to mentally double it.
What i do notice is interesting. My Fitbit says I am sleeping much better. Typically, I would sleep 4 hours lightly and another 4 hours in restless mode. Now, it says I'm sleeping nearly 8 hours a night, often including some deep sleep and REM sleep. I don't feel any differently and still feel like I want to nap during the day, but it's an interesting change.
What I'm waiting to see, something suggested by a friend, is whether the pacemaker changes my heat tolerance. I've heard pros and cons.