@johnbishop @LeeAase I just downloaded the Zero App and the Cronometer App based on your recommendations. I'm technologically challenged, so I really on advice from folks like you. Since both of you have been so successful, it gives me inspiration. Thanks. Lee - it was really interesting to read about the fasting journey you and your wife have been on. I've been having no trouble fasting 20 hours and eating during the four hour eating window the past week. Sometimes I'm not even hungry after 20 hours. I think the Pique Fasting Teas really suppress my appetite and give me more energy, which is pretty amazing. Dr Fung has held 2 Q&A zoom talks with my Pique Tea IF group, and my thinking that longer fasts were dangerous has totally changed. Knowledge is power! Thus, next week I'll add in a longer fast to break things up and try the Zero App. Dr.Will Cole, a leading functional medical practitioner, talked to us too. He just released a new book called Intuitive Fasting. I think I'm going to like it and signed up for a four week IF fasting program with people who had bought his book. Totally changing eating habits of 74 years is difficult, so it is great to join a group to interact with and learn from. Both of these groups have a facebook group, so I had to join facebook, sigh, and figure out how to post. I should be able to loose weight in six weeks of being in supportive IF groups and really get a handle on how to join IF with keto. Luckily keto has a calculator to figure out how many carbs, fat and protein grams I should eat, but I sympathize with John's question of how many carbs he sound be eating. Having these apps will help me figure how many of each I've eaten, which will be a big help. My carbohydrate target is 20 grams a day, which isn't many. I just noticed there is another thread about IF and HFLC and will start following that too. Happy almost spring! Nancy