To make it work
1º)Give permission to acces your images(to be able to compress them..)
2º)Give access to data usage to Auto Resize Image(needed to be able to detect when you open your favorite gallery application..choosen on next stage)
3º)Choose your favorite Image Gallery Apk, and click "READY"
You are done, from now on every time you open your favorite Image Gallery Apk , a screen will show you all your images in case you want to compress any before attach it/send it.
If you want simply doble tap on the image and it will be compresed with high quality but about 2000% smaller in size to save your data plan!!.when done(you can compress as many as you want) simply click the big center icon of your gallery apk and your gallery with the already compressed images will appear.
If do not need to compress simply click the big center icon of your gallery apk.