Reduce for Windows Phone compresses your photos but keeps the quality17
While Reduce compresses your photos, it won't degrade the quality of your snapshots. And while we haven't mentioned it yet, Reduce is a free download although you are offered in-app purchases to make. Once you install the app, you will have the opportunity to buy photo compression packages for 100, 300 or 1000 photos.
You can use Reduce on any handset running Windows Phone 8.1, and this includes some of the outstanding camera-centric models like the Nokia Lumia 1020 and its 41MP PureView snapper, or the Nokia Lumia 930 with its 20MP camera. And there is the 8.7MP camera on the Nokia Lumia 928. With an aperture of f/2.0, the camera takes great photos under low-light conditions.
You can download the app by clicking on the sourcelink.
source: Reduce (WindowsPhone) via WMPoweruser