I think you can just open the iPhone ap and keep it running. I find unless I actually look at the steps that it doesn’t count them so I just make sure it is turned on when I have a big day planned.
When I make a post, I simply click the image button in the posting interface and upload pictures I have taken along the way. Sometimes I find the ap flips or rotates them so I just edit those ones and reupload.
Not perfect as an ap but I like how inclusive it is and all it could be.