A single mobile app icon displayed on a phone home screen among simple, muted placeholder icons with no real logos. Use a standard iOS and Android rounded-square shape with a full-bleed background in the Primary Color and the Central Symbol centered in the Secondary Color. Make the Central Symbol bold and instantly readable at 48 pixels, filling roughly 60 to 70 percent of the icon with even padding. Keep the design flat, minimal and geometric, using confident silhouettes, clean edges and no thin lines or tiny details. Use no more than three colors plus white, with no border, inner frame, text labels or extra symbols. Add a soft natural shadow beneath the featured icon so it stands out from the neutral home screen. Show the icon front-on in a crisp, uncluttered presentation.
Use these details:
Central Symbol: "a simple dumbbell"
Primary Color: "black"
Secondary Color: "lime green"
Using your own logo, product or face? Attach it in the chat and say which of the details it replaces.
Your result will come out close to the example rather than identical to it. Change the details to make it yours.