Is there a safe android emulator?

It is safe to download and run Android emulators to your PC. However, you need to be aware of where you are downloading the emulator. The source of the emulator determines the safety of the emulator. If you download the emulator from Google or other trusted sources such as Nox or BlueStacks, you are 100% safe!

Is BlueStacks or NOX better?

BlueStacks vs Nox – We tested Nox’s emulator compatibility mode and speed mode. Regardless of the mode used, BlueStacks 3’s performed better than Nox in every benchmark category. When running multiple instances in Nox’s Multi Drive, performance decayed exponentially.