If you are looking for legal monitoring tools—typically for parental control employee oversight
You cannot spy on WhatsApp by simply downloading a single file. WhatsApp uses end-to-end encryption. The only ways to monitor a WhatsApp account are either physical access to the device or sophisticated (and often illegal) remote access trojans (RATs).
WhatsApp is an end-to-end encrypted messaging platform. Due to its popularity, a black market has emerged offering "spy" solutions that claim to bypass this encryption. Users searching for "Whatsappspy download" are often seeking parental control solutions, unfaithful partner surveillance, or employee monitoring—though without the required consent.
If your goal is safety or monitoring (e.g., for a child), consider these legitimate methods: