Whatso is a specialized WhatsApp marketing tool designed for Windows operating systems. It stands out for its unique Anti-Blocking feature, which ensures the quick and seamless delivery of messages. Users can broadcast messages to all of their contacts, including those not saved in their phone book. The software allows for personalized greetings in messages, such as including the recipient's name. Additionally, it facilitates the import of contact information from CSV and TXT files or through simple copy-pasting. Users can also extract contacts from WhatsApp groups, utilize a sending log, schedule messages, and filter numbers efficiently. Messages can be sent in various formats, including text, images, videos, audio files, and vCard. It is compatible with several Windows versions, including Windows 10 (both 32 and 64 bit), Windows 8, 7, Vista, and XP. This software simplifies the process of delivering announcements, promotions, and updates to your audience, enabling deeper engagement through personalized communication. With the ability to send thousands of messages to customers and users, it offers a one-time purchase model for lifetime usage, making it a cost-effective solution for marketing needs. Ultimately, Whatso empowers businesses to forge lasting relationships with their audience through effective messaging strategies.