Greatly extends the capabilities of the iPhone – Fusion - HDR Camera Review

The small camera sensor in the iPhone can only produce images with a limited dynamic range. Fusion's ability to align and merge three exposures, taken with a single release of the shutter button, allows it to create iPhone images of significantly expanded dynamic range. Problem solved. An interesting feature is the ability of the app to create asymmetrical brackets. The shadows might be 2.5 stops over and the highlights only a 1.5 stops under - all determined automatically by the app. One benefit is that blown out sky details with a nasty cyan tint are no longer a problem. Lastly, the app has very use full set of tools for adjusting all of the key parameters in the merged image. The app will be improved once the creators enable an end to end TIFF workflow. The present version can merge even 22 meg TIFFs from other sources, but can only output up to 10 meg JPEGs. All in all, Fusion HDR is very highly recommended.
Review by Jock Gill on Fusion - HDR Camera.