Opera
Opera Mini is highly praised for its data-saving and fast browsing features, but faces challenges with ad frequency and occasional browsing issues, which contribute to user churn. The freemium model is generally accepted, though ads are a point of contention.
Issues related to advertisements
Problems with the browsing experience
Data saving capability
Fast browsing speed
Customization options
Requests for additional customization options
Advertisements issues
Opera Mini holds a strong position in the market due to its data-saving capabilities and fast browsing, but faces stiff competition from other popular browsers.