Yes
@BlackRocker57 , we have used iPhiGeNie extensively walking in France - on the GR65, often wandering off camino, and making our own way through the Loire Valley from Orlean and south from Tours, and walking an on/off route from Arles. I also struggled with the user manual. It would be great if there was one written in English and available offline - I know there is a sort of a one but it seems to be a google translate job and I have trouble finding my way through it.
That said, the app itself in the field I find invaluable. I do spend a lot of time downloading tiles into the cashe, so that I have all the scales and can zoom in and out with ease. It is probably taking up a heap of storage space on my phone! But wonderful that you can see instantly where you are, and all the roads, tracks, even buildings around - and all the GRs.
I have to say that in calculating distances we tend to use a very rough and ready measure - zooming in and working it out by using the scale tool. I, like you, have never mastered the waypoint tools.