I now use this for all my simple compression needs, it's an amzing application which really showcases the potential of webapps and the combination of WASM and JS. The UX is a blast and ofcourse it also works really well on mobile, I love it!

Pros:

Super simple, lightweight, amazing UI, very good compression options, no need to download an application, free, open source, use offline

Cons:

Made by Google, but Open Source so not a con

good app but there is no option to insert more then one image to convert, it allows to convert images one by one, that is time consumption, I must give this excelent app 2 stars if the option is available here.......

I'm astonished by the levels of optimization I gotten. From 170kb to 13kb.