Pirated versions don't receive official security patches, leaving your device vulnerable to exploits.
Most Pro versions offer a 3-day or 7-day free trial. Upon first installing the official AppFly app, look for the "Start Premium Trial" button. You will need to enter a payment method (Google Pay/Apple Pay), but you can cancel immediately after activation and still use the Pro features for the trial duration. This is 100% legal and safe. appfly pro free