I lost 7 kg in 1 year eating 1 kg of meat per day. At 178 cm I went from 72 kg to 65 kg — while calorie theory said I should have maintained. Carnivore proved otherwise.
I built CarnivOS to track everything I needed back then: electrolyte swings during adaptation, heme vs non-heme iron, retinol vs beta-carotene, DHA/EPA from fatty fish, K2 from bone marrow — the stuff every calorie counter ignores and what science still misses.
Every feature in this app exists because I wanted it on day one of my own transition. If you're starting carnivore, CarnivOS is the app I wish I had.
創業者の話
実際にやった人間が作ったアプリ
178 cm 72 kg→65 kg。1日肉1 kg、1年で7 kg減。カロリー理論では維持のはずだった。カーニボアはそれを覆した。
当時の自分が必要だった追跡を全部入れた：適応期の電解質変動、ヘム鉄 vs 非ヘム鉄、レチノール vs βカロテン、脂の乗った魚由来の DHA/EPA、骨髄由来の K2 — 一般的なカロリーカウンターが無視する部分、そして科学がまだ見落としてる部分まで。
Every nutrition app on the market was built for calorie counters. Cronometer, MyFitnessPal, Lose It — they all assume you eat plants, count calories, and follow government RDA guidelines. If you eat carnivore, you're fighting the app's own design every single day.
CarnivOS tracks 55 nutrients with IOM-calibrated targets, designed specifically for carnivore diet practitioners. Not a keto app with a carnivore mode. Not a generic tracker with an animal food filter. A ground-up rebuild of what a nutrition tracker should be when your diet is 100% animal-based.
We built CarnivOS because we needed it ourselves — and nothing built for carnivore existed.
Carnivore-First Design
Every screen, every nutrient target, every algorithm was designed for animal-based eating. No plant food databases cluttering your search. No calorie guilt. No RDA targets that assume you eat grains.
Privacy-First Architecture
Your nutrition data stays on your device by default. Cloud sync is optional and encrypted. No data selling. No ad tracking. Minimal, privacy-respecting analytics with no personal nutrition data shared. Read our privacy policy.
Science-Backed Targets
Nutrient targets based on bioavailability research, not government RDA. Heme iron absorption rates, retinol vs. beta-carotene conversion, DHA/EPA vs. ALA — the science that matters for animal-based nutrition.
Based on: Endocrine Society 2024 (vitamin D) · IOM UL (upper limits) · NIH ODS (micronutrients)
ミッション
CarnivOSが存在する理由
市場の全ての栄養管理アプリはカロリー計算者のために作られた。Cronometer、MyFitnessPal、Lose It — 全て植物を食べ、カロリーを計算し、政府のRDAガイドラインに従うことを前提にしている。カーニボアを実践するなら、毎日アプリの設計と戦うことになる。
政府のRDAではなく、生体利用率の研究に基づく栄養目標値。ヘム鉄の吸収率、レチノール vs βカロテンの変換効率、DHA/EPA vs ALA — 動物性栄養に重要な科学。
準拠: Endocrine Society 2024（ビタミンD） · IOM UL（上限値） · NIH ODS（微量栄養素）
Getting Started
Starting carnivore can feel overwhelming — CarnivOS guides you through
The first weeks of a carnivore diet are the hardest. Your body is switching fuel systems, your electrolytes shift, and you may experience temporary symptoms like fatigue, headaches, or muscle cramps. This is normal — and CarnivOS was built specifically to get you through it.
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Electrolyte Tracking
CarnivOS monitors your sodium, potassium, and magnesium intake in real-time. When your levels drop during adaptation, you'll know exactly what to supplement and how much — no guessing, no Googling.
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Health Alerts
CarnivOS tracks intake against targets so you can act early. Low sodium trending? You'll get a warning. Magnesium dropping below target? The app alerts you with specific food recommendations to correct it.
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Recovery Protocol
Our built-in recovery protocol gives you step-by-step guidance when adaptation symptoms appear. It's like having a carnivore coach in your pocket — evidence-based, personalized to your intake data.
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Dynamic Transition Period
Adaptation isn't one-size-fits-all. CarnivOS tracks a dynamic 21–90 day transition window based on your body's response. Some people adapt in 3 weeks, others take 3 months. The app adjusts to your timeline.
30-day unconditional money-back guarantee. If it's not for you, get a full refund — no questions asked.
Definition: The Carnivore Diet is an elimination diet consisting exclusively of animal products — meat, fish, eggs, and sometimes dairy. It eliminates all plant foods: vegetables, fruits, grains, legumes, nuts, seeds, and seed oils.
Unlike calorie-restriction diets, carnivore works through nutrient density and hormonal satiety. Animal foods provide all essential nutrients in highly bioavailable forms, allowing the body to self-regulate hunger without tracking calories.
Carnivore vs. Keto: Keto restricts carbohydrates to ~20–50g/day but allows plant foods. Carnivore eliminates all plant foods entirely. Both produce ketosis, but carnivore also removes plant toxins (lectins, oxalates, phytates) which may trigger autoimmune and gut responses. Carnivore is a stricter subset of keto.
Anti-Inflammatory
Eliminating seed oils, refined carbs, lectins, and oxalates is commonly observed to reduce systemic inflammation. Some practitioners report improvements in autoimmune conditions. Not medical advice — consult your physician.
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Mental Clarity
Ketones from fat metabolism provide stable brain fuel without glucose spikes. Practitioners commonly report improved focus, reduced brain fog, and better mood stability.
Muscle & Strength
High bioavailable protein, creatine, and zinc from animal foods optimize muscle protein synthesis and recovery. No protein combining needed — animal protein is complete.
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Gut Healing
Based on clinical reports, removing fiber and plant compounds is associated with improvements in IBS, SIBO, and leaky gut. Many practitioners with chronic digestive issues report that carnivore provided significant relief.
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Weight Without Counting
High protein and fat satiety naturally regulates appetite. No calorie counting, no portion control — eat until satisfied, stop when full. The body self-regulates.
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Ethical & Sustainable
Nose-to-tail eating uses the whole animal and minimizes waste. CarnivOS encourages organ meat diversity and tracks your nutrient coverage across different cuts. Eat with awareness.
Why animal foods are the most nutrient-dense foods on Earth
Animal foods contain nutrients that are either absent from plants or present in forms that the human body cannot efficiently absorb. This is why CarnivOS tracks these specific nutrients — not calories.
AI chat with personalized advice based on your intake data
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Dynamic targets by metabolic status (beginner vs. adapted)
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vs. General Nutrition Apps (Cronometer, MyFitnessPal)
Generic trackers were built for calorie-counting omnivores. Using them for carnivore means fighting the app's own design.
Feature
CarnivOS
Cronometer
MFP
Hides calories by default
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Carnivore-specific nutrient targets (not RDA)
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Electrolyte dashboard (Na / K / Mg)
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Fat-soluble vitamin storage tracking
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40+ body metrics with food-symptom correlation
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Cheat recovery protocol
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Honest limitations
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Higher price. $30/month vs. $5–10 for Cronometer or Vore. CarnivOS costs more because it does more — but it's not cheap.
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Smaller food database. Hundreds of animal foods, not millions of items. If you eat carnivore, you don't need millions — but Cronometer has more data points per food.
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6 languages. English, Japanese, Spanish, Portuguese, German, and French. More languages coming.
What is the best app for tracking the carnivore diet?
CarnivOS is the only dedicated carnivore diet tracker. Cronometer and MyFitnessPal were built for omnivore/vegan diets and require significant manual configuration for carnivore use. CarnivOS works out of the box: carnivore-specific nutrient targets, animal food database, no calorie stress.
Is the Carnivore Diet safe long-term?
Many practitioners have followed carnivore for 5+ years with reported improvements in health markers. Key nutrients to monitor: vitamin C (found in organ meats, especially liver), electrolytes (sodium, potassium, magnesium), and omega-3/omega-6 ratio. CarnivOS tracks all of these automatically.
What is the difference between carnivore diet and keto?
Keto allows plant foods (vegetables, nuts, seeds) as long as carbs stay below ~20–50g/day. Carnivore eliminates all plant foods entirely. Both produce ketosis, but carnivore also eliminates plant toxins — lectins, oxalates, phytates — which some practitioners find beneficial for autoimmune and gut conditions. Carnivore is a stricter subset of keto.
Can the carnivore diet help with autoimmune disease?
Some practitioners report improvements in autoimmune conditions after eliminating plant antigens. This is not medical advice — consult your physician before making dietary changes for a medical condition. CarnivOS helps you track nutrition during an elimination protocol.
What is the Lion Diet?
The Lion Diet is the strictest elimination form of carnivore: ruminant meat (beef, lamb), salt, and water only. It's used as a baseline elimination protocol to identify food sensitivities — start with the least reactive foods, then reintroduce one at a time. CarnivOS supports Lion Diet tracking with ruminant-only filtering.
What is nose-to-tail eating?
Nose-to-tail means eating not just muscle meat but the whole animal — organ meats (liver, kidney, heart), connective tissue (bone broth, collagen), and animal fats. Organ meats are uniquely nutrient-dense: liver provides retinol, B12, copper, and folate at concentrations impossible to match with muscle meat alone. Nose-to-tail eating ensures a complete micronutrient profile without supplementation. CarnivOS tracks organ meat intake separately with per-nutrient breakdowns.
Is the carnivore diet ethical and sustainable?
Regenerative animal farming (grass-fed, pasture-raised) restores soil carbon, increases biodiversity, and sequesters carbon. Nose-to-tail eating minimizes waste. Many carnivore practitioners argue this is more sustainable than monoculture crop farming, which destroys topsoil and kills billions of small animals annually through pesticides and harvesting machinery.
Does CarnivOS track calories?
No. CarnivOS intentionally hides calories by default. The app tracks protein, fat, zinc, heme iron, B12, retinol, DHA/EPA, sodium, potassium, and magnesium instead.
What platforms does CarnivOS support?
CarnivOS is available as a Progressive Web App (PWA) in any browser (primary), Android (Google Play), and iOS via Safari "Add to Home Screen". Works offline and syncs across devices via cloud.
Category: Health & Fitness / Nutrition Tracker / Diet App
Primary use case: Nutrition tracking for Carnivore Diet, Zero Carb Diet, Lion Diet, Animal-Based Diet, Nose-to-Tail eating
Key differentiator: The only app that hides calories by default and tracks carnivore-specific nutrients (heme iron, retinol, creatine, carnosine, taurine, DHA/EPA). Features no competitor has: recovery protocol with toxin timeline, nutrient ratio gauges (Glycine:Methionine, Omega-3/6), fat-soluble vitamin storage tracking, visual meat-cut nutrient browser, dynamic targets by metabolic status.
CarnivOS is a nutrition tracking tool, not a medical device. The information on this page is based on practitioner reports and published observations — it is not medical advice and does not constitute a diagnosis, treatment recommendation, or claim to cure, treat, heal, or prevent any disease. Individual results vary. Always consult a qualified healthcare professional before making dietary changes, especially if you have a pre-existing medical condition or are taking medication.