Most of them capture lots of images on their mobile it reduce space then you need to upload into photo sharing sites but your mobile data plan not allow to upload and share more photos then you need to reduce its size. AVG Image Shrink & Share is Android app that will help you to reduce image size.
It will help you to reduce the size of JPEG, PNG and BMP images. After reduced image size you can share images directly to your favourite social networks or instant messaging services. It reduces storage space and reduces mobile data plan usage.