I'll have to add that I use ImageOptim at 80% JPEG quality and disabled 'JpegRescan' and 'Jpegtran' for the test results.

I'm a big fan of ImageOptim as it outperforms JPEGmini in many ways and its free. Since I didn't test any of the JPG compression options, I'm splitting the stars between 0 and 5, at 2.5. So, if you need an app that compresses PNG files, I would not recommend Squash over Pngyu, even if the prices were the same.ДЄs it is, Pngyu is free, and the speed, options for compression, and default compression setting all blow Squash out of the water. Then I compared them visually and couldn't see any difference between any of the compressed files. I ran the same original files through Pngyu on the default compression, and the results ranged between 62 KB and 75 KB, and it was completed in 2.8 seconds. It took 1 minute, 12 seconds to complete, and the range of compression was slightly better at 131 KB to 174 KB. I went into the apps settings, and turned on the 'More Compressed (Slower)' option, and then ran the original files through again. Compression took 7 seconds and the file sizes dropped to between 159 KB and 202 KB. Since Squash is a paid app (that I was getting to use for free), I was expecting it to be at least comparable.ДЇor my test, I used 12 png files generated from Photoshop that ranged in sizes between 177 KB and 220 KB.ДЇirst I tried Squash's standard setting.

I only tested one of Squash's uses PNG compression, to see if could serve as an acceptable replacement for my current app Pngyu (free). Luckily I was trying this through Setapp, so I'm not out any money.

App imageoptim