From our experience, using WhatsApp is the most discreet method for providing feedback in a restaurant setting. This allows for Tippsters to communicate their opinions and suggestions without fear of retaliation or any loss of anonymity.
With the use of smartphones, taking photos and videos in a restaurant has become a common practice, hence using WhatsApp to take pictures and videos, the Tippster blends in while easily capturing the atmosphere, presentation, and quality of food and drinks.
Not only does everyone know how to use WhatsApp, but another advantage is its real-time capabilities, allowing the Tippster to ensure no crucial information is missed during the mission, allowing the data to be reviewed immediately after the visit is completed.
That's why we use WhatsApp!