The problem is a clock sold as a diet. Sixteen hours empty does not cancel 3,000 calories in the other eight. The window can help you skip a meal. It cannot invent a deficit. We do not cite a 2024 Obesity Reviews meta-analysis with 1.2 kg versus 3.8 kg. That paper is not on our desk. Option 1 is Khatwa. Photograph the meals that land in the window. See calories and protein. Ask the coach what is left before the second plate. Free on iOS and Android. A fasting-timer app is option 2 if you only want a countdown.
What Khatwa does not do
It does not shame a skipped breakfast. It also does not auto-split macros across a 16:8 protocol. You log what you ate. The leftover number is the plan. Late-night calories still count: late calories still count. Deficit math: calorie deficit explained.