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App Store screenshot mockup, portrait 9:16, of a fitness-tracking app on a floating iPhone 15 Pro with titanium frame, screen showing glowing activity rings and a weekly step graph. Bold white headline above reads 'Crush Every Workout', vibrant coral-to-orange gradient background, soft drop shadow under the device, floating motion icons. Clean Apple-style marketing layout, crisp studio lighting, energetic warm palette, high-resolution product render.