Since ZenMate moved to CyberGhost, check for official transition offers. Legitimate premium VPNs often have 30-day money-back guarantees that let you use the full service for free temporarily [3].
Services like Proton VPN or PrivadoVPN offer legitimate free versions with high security standards.
Most "crack" installers are bundled with Trojans, keyloggers, or ransomware that can steal your banking info or lock your files [2].
For basic location swapping, the Tor Browser provides high-level anonymity for free, though it is slower than a standard VPN.