+1 here. I'd love fancy graphs. I'm also thinking a single graph with multiple exercises progressions, so the y axis is 1 rep max, the x axis is time, and there is a line plot for each exercise. Users could toggle the exercises selected in the plot

+1 

would be awesome if you could tell the app exactly what weight increments are to hand so it always directs to something that is possible. I rarely have exactly the weight asked for. not a big problem, but it's nice to not have to think about anything except lifting the things.