Strip away the supplement ads and influencer routines and muscle building comes down to one mechanism repeated for months: progressive overload, meaning you ask the muscle to do slightly more over time (a bit more weight, a rep or two more, a touch more volume) so it has a reason to adapt. Moderate reps, roughly 6 to 15 per set, with a few sets per muscle spread across the week, covers most of what actually matters — no exotic rep scheme required.
This builder sets its "Hypertrophy" focus to exactly that: moderate-rep training structured around your days, experience and whatever equipment you've got, free, for up to 3 sessions a week over a 4-week block. If a particular muscle group is lagging and you'd like the plan to lean on it specifically, that's a "muscle priority" option on the Basic tier (well under $1/month) — a nice-to-have, not a requirement to make progress. Just try the free build first and see how it structures your week.