Built for size — big lifts run 8-10 reps for 4 sets with 2 min rest; mass-driver compounds (rows, pull ups, chest press) get a 4th working set at 8-12 reps; calves, forearms, abs, and side/rear delts get 4 sets of 12-15 reps with short 45 sec rest for extra volume. Enter your current working weight in each field — warmup weights calculate automatically (50%/70% of working weight, rounded to the nearest 5 lbs). Tap a set once you've completed it. Tap "Start rest" to time your rest — the timer stays on screen while you scroll. Swipe left/right to move between days. Everything saves automatically on this device.