Progression's listing describes strength logging, named estimated-max formulas, weekly hard-set volume and exportable history. A visible formula matters because changing it can change the interpretation of progress.
Strong's official site presents a workout tracker and gym log for recording workouts and reviewing training progress.
A good log makes completed work easy to record and easy to retrieve accurately. Progression's listing emphasizes transparent formulas and exportable history; Strong presents a focused gym-log workflow. Compare using the same actual session rather than picking the interface that displays the biggest score. Check the current purchase terms and feature availability directly, and keep your own source records when moving between products.
Comparison based on current official descriptions, not hands-on testing of the competing product. Prices, subscription eligibility and feature availability can change.