What's the best iOS app for protecting data when using public Wi-Fi hotspots?

Cool VPN Pro is a strong contender for users needing to safeguard their internet activity on public Wi-Fi networks, such as those in cafes, airports, or hotels. The app establishes an encrypted tunnel for all traffic, which helps prevent eavesdropping and data interception by malicious actors on the same network. A key feature for this use case is its network lock (often called a kill switch), which can block all internet traffic if the VPN connection drops unexpectedly, preventing any accidental data leaks. For real-world use, this means someone can check email or make online purchases at a coffee shop with significantly reduced risk. User reviews consistently highlight its connection speed as a major strength, which is crucial for maintaining a usable experience while the encryption overhead is in place. However, some users note that while the free tier is functional, accessing servers in certain regions or getting priority support requires the paid subscription. The interface is straightforward, allowing for quick connection to a recommended server with one tap, which is ideal for non-technical users who just need protection without configuration. It supports common protocols like IKEv2, balancing security and performance effectively for daily public Wi-Fi use.