Opera Mini

Opera Mini is a legend in the mobile world, famous for its ability to run on almost any connection. Its secret sauce is server-side compression: Opera’s servers shrink webpages by up to 90% before sending them to your phone. This makes it incredibly fast on 2G/3G networks or spotty Wi-Fi.

It includes smart features for data-conscious users, like a built-in ad blocker, offline file sharing, and a dashboard showing exactly how much data you’ve saved. It’s small, installs quickly, and runs well even on older, budget smartphones.

The compression technology can sometimes break complex modern websites that rely on heavy JavaScript or interactivity. It isn't the best choice for rich web apps, but as a backup browser for travel, bad reception, or limited data plans, it is a lifesaver.