Fasting Center vs Formulate

Free fasting tracker and timer for intermittent fasting, OMAD, and extended water fasts. No ads, no account needed. Fasting Center is built around your numbers, not generic guesses. Start a fast, follow 17 fasting stages on a live ring, and see weight, fat loss, and energy use projected from your own body stats, then measured against what actually happened. TRACK YOUR FAST - Timer with stage markers: fat burning, ketosis, autophagy, and more - Any schedule: 16:8, 18:6, 20:4, OMAD, multi-day extended, or open-ended - Live Activity and Dynamic Island on iPhone, home screen widgets - Edit start and end times when life happens - Projected vs measured weight loss, side by side ASK YOUR FASTING ASSISTANT - Ask about your fasts, your weight, or how you feel during a fast - Answers based on your own log and the fasting.center knowledge base - Runs the calculators for you - how long to a goal weight or a body fat target - Free, with a daily limit of questions TWO CALCULATORS - Extended fast: total weight change, fat, water, glycogen, and protein loss day by day - Intermittent fasting: daily calorie deficit and expected weight change for your window - Personalized from your sex, age, height, weight, body fat, and activity MEASURE YOUR PROGRESS - Log weight, body fat, waist, ketones, glucose, and blood pressure - Rate energy, hunger, motivation, and stress during a fast - Apple Health sync: weight and body fat flow in automatically - Charts over 24h, 7 days, 30 days, 90 days, and a year - Import your history from Zero and Easy Fast YOUR DATA, YOURS - Free, no ads, no subscription - Works fully as a guest; optional sign-in with Apple or Google for cloud backup and sync - Delete your data and account anytime, completely Whether you are planning your first extended fast or fine-tuning a routine you have run for years, Fasting Center shows you what to expect and what actually happened. Fasting Center is a planning and estimation tool and does not provide medical advice. Consult a healthcare provider before starting an extended fast, especially if you have any underlying health conditions.

Formulate scores your whole routine (supplements, food, sleep, fitness and personal care) and shows you the next change worth making. ONE NUMBER FOR YOUR DAY Everything you take, eat and do adds up to one daily score. See what you've logged, your potential if today goes to plan, and your ceiling once your routine improves. YOUR DAY, WINDOW BY WINDOW Today splits your day into windows, from wake-up to bedtime, and shows what's due right now and what each window is worth. CATCH WHAT CANCELS OUT Formulate spots the combinations that quietly cost you, like calcium blocking iron absorption or fish oil taken without a meal, and gives you the easy fix. THE NEXT CHANGE WORTH MAKING Raise your ceiling: Formulate finds the change that moves your score most, free. With Formulate+ you get the whole plan: every change across every pillar, ranked by how much it moves your score. A food to add, more time asleep, a better sunscreen. 8,643 PRODUCTS, EVERY ONE SCORED Browse 13 catalogs of foods, recipes, supplements, sleep, fitness gear, therapies and personal care. Each product gets a transparent, evidence-based score built on ingredients, dosing, form, third-party testing and brand trust. When something does the same job better than what you own, you'll see it. SEE IF YOUR STACK ACTUALLY WORKS Add your lab results for free. Every marker is shown against its lab range and our target, how it moved since your last panel, and which item in your stack it's linked to. Test it also tells you what to ask for, where to get tested and roughly what it costs. ASK YOUR OWN DATA Ask anything about your stack, your meals or your labs. Answers come from what you actually take, eat and log, and the coach remembers you. A RECORD THAT DOESN'T FLATTER YOU Every day is scored and kept. Streaks count days you logged, not days you meant to, which is why they mean something. FOOD AND NUTRIENTS, NOT JUST PILLS Log whole foods and meals alongside your supplements, scan a barcode or snap a photo, and see your real nutrient coverage and where the gaps are. SLEEP FROM YOUR WEARABLE Connect Oura and Formulate names the weakest part of your nights and the change most likely to help. TRAIN AND WATCH IT COUNT Run a live workout with a timer and your last session's numbers. Every set counts toward your week. LEARN WHAT APPLIES TO YOU A library that knows your stack: a 453-entry encyclopedia, 61 research summaries, 47 guides and 8 guided tracks, with reading picked from what you actually take. PRIVACY-FIRST Your health data stays yours. We don't sell it to advertisers. You can delete your account and all data anytime from Settings. SUBSCRIPTION Formulate is free to download and use, including the full catalog, scores, stack and nutrient tracking, the single best move to raise your score, and your lab panels. Formulate+ is an optional subscription: $12.99/month or $89.99/year, with a 7-day free trial for new subscribers. It adds your whole ranked plan to raise your ceiling, unlimited photo logging (free includes 15 a month), photo and PDF attachments in chat, projects, and 150 chat messages a day. Barcode scanning is free for everyone. everyone. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. Manage or cancel anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Service Terms: https://formulate-health.app/terms Privacy Policy: https://formulate-health.app/privacy Formulate provides educational information to help you organize your supplements and nutrition. It is not medical advice and is not a substitute for a qualified healthcare professional. Always consult your doctor before changing your supplement or diet routine.