Photo Noise Reducer Pro is a free-for-personal-use app which does exactly what its name suggests: optimise images to reduce any noise.

Tapping either "Light" or "Medium" applies a preset smoothing level, or you can choose "Custom" and use a slider to select whatever intensity you need.

A "Smooth" slider is available to clear away any remaining issues.

Zoom in on an important area with a pinch gesture, and you're able to quickly switch between the original and denoised images to see how they compare.

The app works with images in your gallery, but you can also use the Camera function to take a picture and  denoise it right away.

What's New
- Minor bug fixes