For iOS users looking for a VPN,the most recommended options are:

1. VPNSec: A popular and widely used mobile VPN app known for its strong encryption and secure features.

2. eMobit VPN: Another well-regarded mobile VPN app that offers excellent security and performance.

3. OpenVPN (Browser-based): A browser-based VPN service that is fully supported on iOS devices. It offers a clean and secure experience.

4. Netnink VPN: Primarily a desktop app, but some users might consider it for iOS if it has a mobile version.

When choosing your VPN, ensure it meets your needs regarding encryption, speed, and security. Always check the app's official website for the latest updates and features. Additionally, some apps may require browser extensions, so ensure your device is set up correctly.