Looks like a great app! I run 5/3/1 and this is perfect. Currently I use https://strong.app but I'd love to see a way to see my weekly volume per muscle group. Is that something you are planning to add on Hardy?
I added your wish to our subreddit as a feature request: https://www.reddit.com/r/hardyapp/comments/nzsmu2/feature_re...? If your username is there as it is here I can notify you once we have added such a feature. :)