Hudsight is not a full-blown editor like Photoshop or Lightroom. Instead, it sits on top of any application you are using (Capture One, Darktable, your web browser, or even built-in Windows photo viewer). Its main features include:
If you want to try or buy HudSight safely, use these official methods: Hudsight Activation Code Free
If you find websites offering "free activation codes" or "cracks," be cautious: Hudsight is not a full-blown editor like Photoshop