LoyaltyHarbour Image Optimizer

It really does work! Significant improvement and the support is top notch, never had better support in my life! If you're on the fence I'd tell you it's worth your money and more!

[UPDATE: 1 year later] Still using it and still one of the best apps and best customer service EVER. Thank you again :)

Great little app, as you know google likes fast pages so compressing images can really help, these guys are cheap and do exactly what it says!

Optimized nearly 2700 images and reduced file sizes by 37% on https://www.dollarbender.com and https://www.magneticcablesstore.com

This is amazing! I'm only annoyed that I didn't get this app sooner. For $17 my website is not only faster for my visitors, but maybe more importantly my Google Pagespeed score has gone from RED (51%) to AMBER (79%!!!). If I understand correctly, this will improve my Google rankings and make my Adwords campaigns more cost effective. For $17! I was trying to do this myself image by image ... I'm glad I only did a few hundred (!) before I found this app.
ChateauAntiques.com is much faster now - take a look (buy some antiques if you like!), I'm really happy with what this app has done and giving five stars is the least I can do for the developers.

I was impressed of how quickly optimized the images and I am hoping it will improve SEO. I recommend this app. the cost is so minimal 1 cent per image try it you won't loose. Thank you.

Works great and really helped compress images without losing quality!

works great, fast and amazing price for what you get. will use this for all of my stores.

Huge amount of space saved and such an easy app to install and get going. Thank you.

The app is super user friendly, with fast support responses. I needed to optimize my file sizes for faster load times. The first wave was done over night. The quality is great and the cost is affordable with 2 ongoing options for images.

Works very well and much better than other apps I have tried that claim to do the same thing