Marrow Health: Calorie Counter

Marrow is a free calorie counter and fitness tracker that also puts every Apple Health metric in one place, and gives all of it back to you as files, automations, or a live connection to your AI. No account, no ads, no subscription required. EVERY METRIC, NOT A CURATED FEW Marrow reads more than 170 Apple Health data types: steps, heart rate, HRV, sleep stages, blood oxygen, respiratory rate, walking steadiness, body composition, cycle tracking, and the long tail Apple never puts in a chart. Add its own meal diary and strength log and you are tracking 178 data series in one place. If your watch or a connected app records it, Marrow shows it, with daily, weekly, and monthly trends. FOOD LOGGING THAT IS ACTUALLY FAST Photograph a meal and get a nutrition estimate you review and edit before it is logged. Scan a barcode. Or search a USDA food database built into the app, which works with no signal at all. Marrow tracks 39 nutrients per meal, not just calories, and writes it all back to Apple Health. WORKOUTS, BUILT AROUND YOUR GYM Tell Marrow what equipment you have and it builds a program for your days and goals: sets, reps and the weights to try, adjusting as you lift. Log with last time's numbers in front of you, a rest timer, warm-up sets and supersets. A body map of 22 muscles shows what your week has covered and what it has not. 777 exercises with photos, or create your own. Cardio with the route. Workout history sits next to the health metrics it moved, so you can see what your training is actually doing. APPLE WATCH Calories left, macros, water and your last meals on your wrist, with complications. Say what you ate and your iPhone logs it. WIDGETS Today's calories and macros, your daily statistics and one-tap logging on the Home Screen, plus Lock Screen widgets. YOUR DATA LEAVES WHEN YOU WANT IT TO Export CSV, JSON, or GPX. Schedule automations that post to a server you choose. Pair your own self-hosted mirror. Marrow was built by someone who got tired of health data being trapped in an app that would not give it back. BUILT FOR AI, IF YOU WANT IT Marrow can serve your health data over the Model Context Protocol, so Claude, Cursor, or any MCP client can read it with a token you control. It ships turned off, runs on your own device, and costs nothing. MARROW PRO, OPTIONAL Everything above is free and stays free. Marrow Pro adds the parts that cost us to run: unlimited AI logging (photo, text and voice; free includes 3 a day), Connect your AI (a private hosted copy that ChatGPT, Claude or Gemini read any time and, if you allow it, log to when you ask: meals, workouts, sleep and more; every sign-in is approved from your phone), and campus dining hall menus. Monthly or yearly with a 7-day free trial, or a one-time lifetime purchase; prices are shown in the app. Subscriptions renew automatically until cancelled in your Apple ID settings; cancel during the trial and you pay nothing. WHAT MARROW DOES NOT DO No account. No ads. No tracking SDKs; the only third-party SDK is RevenueCat, which records purchases and never sees health data. No selling data. No subscription required. Your health data stays on your iPhone unless you deliberately send it somewhere, and the app makes it obvious when that happens. Requires iOS 17 or later and Apple Health. Marrow is a wellness tool. It does not diagnose, treat, cure, or prevent any condition, and it does not give medical advice. Privacy Policy: https://marrowhealthapp.com/privacy Terms of Use: https://marrowhealthapp.com/terms