Opera mini is fast and light weight browser.you can download at play store. It is very small size software.
Interface of the mobile also very clean and easy to use.
Available for mobile and computer. If you use opera mini for laptop then it also save your laptop battery.it also has one mobile data saver option which makes it very useful.
Secure and fast : opera mini is very fast browser as compared to other browsers. It also has good security options, which makes it very reliable.
Opera mini has extensions like vpn which you can use to hide your location.
Overall opera mini is very useful browser.