Mark the wheels on listing photos, blacken them, download. Handles a whole batch at once, and remembers where you tapped last time.

How this demo works: tap each wheel to place a mark, then the app darkens that circular area while keeping the original shading and reflections. Marks carry over to your next photo automatically, so a batch shot from the same angle needs little to no re-tapping. Add several photos at once and download them all together as a zip.