This app was mentioned in 4 comments, with an average of 1.00 upvote
I use exif notes and photo friend as well, and can recommend both. I love getting the exif data on my film scans with exif notes so I can catalogue them properly in darktable and google photos.
I would also recommend Dev it for a darkroom timer, although I actually tend to just use my watch these days.
My personal app of choice is Dev It, I especially find the C41 timer useful.
I use Dev It, which is free and does everything that I'd want from it.
For Android I can recommend Dev it.