What a free strength training app should solve
Many free lifting apps are useful as logs but stop short of planning. That is fine if all you need is a notebook. It is weaker when you want a session that can adapt without hiding the practical features behind a subscription.
A useful strength app should reduce decision fatigue without pretending your body is the same every day. The best pages in this cluster focus on the moment before training: what should change, what should stay, and how to keep progress moving without making every workout a maximal test.