WA Bulk Marketing is a free Android app developed by Easy Utility. It falls under the Utilities & Tools category and is designed to send bulk messages to WhatsApp contacts without adding them to your phone's contacts list. The app allows you to enter bulk mobile numbers manually or upload them via an Excel sheet. You can also check if the numbers are valid and remove duplicates.

Once you have added the mobile numbers, you can enter the message you want to send, select the interval time between two messages, and even attach an image for promotion. The app uses Accessibility Services to automate some features like clicking and going back where necessary. However, if Accessibility Service is not enabled, clicking the "Send Message" button will redirect you to the setting to enable it.

It is important to note that if you are using a business account, you should send messages to a maximum limit of 500 mobile numbers, and if you are using a personal account, you should send messages to a maximum limit of 100 mobile numbers to avoid suspension.