Excellent app and usable for free. There are in-app purchase options for what I assume to be more advanced features, something I will be looking into at some point when I have the need for more customised results.
It works great and is free. You have to watch an ad after you select the photos you want compressed and sometimes you can't close the ad without closing the whole app, but your photos will still have been compressed.
Works better than Photo Compressor, because it just brings up the system's filing software when selecting photos instead of trying to show the file system within the app. This way is much quicker and easier to use. Can compress large batches of photos (I did 500) very quickly for their size. Much better to have an app than online as well as you can bypass having to upload the images to a website then download them again. Option to replace all files with compressed version is a great feature too.
I love this app. I have not been able to share photos by text or email for years as I now live in the mountains and the internet is awful. This little app is easy to use and I wish I had thought of getting it long ago.