I coach people for powerlifting and create their programs in Google Sheets. I even have functions setup for converting a given weight to their plate breakdowns (for example 455lb squat would be broken down as: bar, 4x45lb plates, 1x25lb plate). My athletes can enter their current one rep maxes and the sheet auto updates the numbers for each training session. They can record notes about how each set went, how many reps they got etc. and then I can review them. It's all super convenient.