This app was mentioned in 5 comments, with an average of 1.20 upvotes
I used to use this app called Cram which compresses photos without really affecting the quality of the photo. You get 300 free "Crams" or have the option to pay for unlimited. There is a trick that I used to do for "unlimited" crams which is to go into your system settings, then Apps, search for "Cram" , then Storage and Clear Data and Cache. It should thereafter reset to 300.
Its been a good while since I used it but it worked for me
You can try to use this app called Cram in the Play Store
It compresses photos to a smaller file size. You get 300 free "Cram" unless you pay for unlimited. However, I used to get "unlimited" by going to the phone Settings, searching the App, and clearing data so it resets it.
Just a recommendation
Sorry I thought it was Cram It but its this one
Think no more. This is what you were looking for. Download Cram. https://play.google.com/store/apps/details?id=com.accusoft.thinpic
i don't know what exactly cram compresses, but it works wonders linkme: cram
EDIT: bot didnt post the right one, this is https://play.google.com/store/apps/details?id=com.accusoft.thinpic