Do you prefer (tracking) or tactical (flick) shooting?
Software like KovaaK's or Aimlabs has specific routines for "Recoil Control" and "Smoothing."
Most games (like CS2, Rust, or Apex Legends) have fixed or semi-fixed recoil patterns. Practicing the "inverted" movement of that pattern in a firing range is the most effective skill-based method. If you’d like to improve the right way, let me know: Which game are you playing? Are you on PC or Console ?
Many sites offering "free hacks" are fronts for keyloggers or viruses that can steal your personal data [3].