With David Crawshay's Topo Canada you do indeed have to download the specific 1:50000 sheets you want while you are connected to the internet.
Once you have downloaded the sheets - BTW- did you download the specific sheet for your current location? - you need to start the app by clicking on it. Once the app is on, the map showing your general area will appear. Clicking on the bottom left arrow icon will place a flashing circleon the map indicating your precise location.
Possible Problems:
1. Perhaps you have not allowed the app to access your location? Go to Privacy>Location Services and make sure it is on.
I don't see how to find those settings. I somehow got my location to show but I'd like to know how so I can fix it in case it mysteriously disappears again
then scroll down to see the various apps using location services. You will find the Canada app. it has three options with respect to location services - 1. never allow access; 2. allow access while using the app; and 3. always allow access.
I chose #2.
2. Perhaps you need to update the ios on your iPhone. I had an iPhone 4S and had it running ios 9 with no problem other than a bit of a speed hit. Maybe your son can update the ios for you - if he hasn't already done so.
I asked my son and he said it could not be updated. Maybe my son is mistaken, or maybe Apple no longer allows that? As of ios 8.3 or so it became possible to put the device in Airplane mode and still have the gps function work.
Still undecided is whether I will also take along my Garmin Oregon! For occasional location checks the iPhone is perfect; for continuous tracking and archiving the Garmin is still a better device.
I didn't think you could show waypts or tracks on the phone either. I haven't reread the prev pages to verify that. I find that quite useful as a part of trip planningThx for all your help so far. Limke so many things, I can't decide whether to call this tinkering around a challenge or a PITA----there's a fine line between the 2 and I guess it depennds on which side of the bed I got out on!