Compressionless, not lossless...

I`ve tried this app on a large number of jps coming from my Nikon D7100, and my iphone 6 plus. Compression varies between 0,51% and 13%. Leaving the app useless. In my opinion this is a ripoff. So far tinypng.com has actually worked the best for me. Compressed the same files between 50-72%. (yes, tinypng.com handles as jpgs too). I wish I had an app on my computer, but I guess I have to keep looking.

Zachcel about Lossless Photo Squeezer - Reduce Image Size