--- title: "n=1 — Longevity Tracker - Reviews, Revenue and Downloads in China | Apple App Store" description: "Stop eyeballing trends in Apple Health. HONEST ABOUT RIGOR n=1 is for self-experimentation — unblinded, uncontrolled, sample size of one. Results screens say so in plain language. The point isn't pro" --- # n=1 — Longevity Tracker — China ![N=1 App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/b8/f6/11/b8f6113f-80fd-57f5-693c-22772abc04ba/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Gennadii Tsypenko](https://apptail.io/developer/gennadii-tsypenko-zaGxwb) **Category:** Health Fitness **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** berlindevs.longevitytracker **Store:** Apple App Store **Country:** China **Version:** 1.0.1 (released 2026-05-01) **Original Release:** 2026-04-28 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/cn/app/app/id6762523189) **AppTail Page:** [https://apptail.io/app/n1-longevity-tracker-nhxz/china](https://apptail.io/app/n1-longevity-tracker-nhxz/china) ## N=1 Description Stop eyeballing trends in Apple Health. HONEST ABOUT RIGOR n=1 is for self-experimentation — unblinded, uncontrolled, sample size of one. Results screens say so in plain language. The point isn't proof; it's a structured way to see whether the thing you're trying actually moves your numbers. THE CORE LOOP • Pick a curated protocol or design your own (intervention + duration + tracked metrics) • Log adherence and optional energy / sleep quality / mood scores in a 15-second daily check-in • HealthKit data is fetched on demand: sleep, HRV, resting heart rate, weight, VO2 max, glucose, body temperature, workouts • When the protocol ends, see a baseline-vs-protocol chart per metric with the % change called out PROTOCOL LIBRARY 12 curated experiments across sleep, circadian, cardiovascular, recovery, and lifestyle — creatine, magnesium glycinate, Zone 2 cardio, morning sunlight, and more. Every protocol ships with a falsifiable hypothesis, an honest evidence summary, explicit cautions, and a difficulty rating. No fabricated effect sizes. SHARE A RESULT When a protocol ends, share a clean image card with the headline metric, supporting numbers, and a link back to the app — for your group chat, journal, or wherever you log your experiments. PRIVATE BY DEFAULT n=1 works fully offline. Your HealthKit data stays on your device — no ads, no analytics, no third-party tracking, no account required to start. n=1 is a self-experimentation tool, not medical advice. Always consult a qualified healthcare provider before starting any new health protocol. ## N=1 Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/3f/e9/31/3fe9318a-4923-9af6-b647-0fca00c5b628/iPhones__6.9-01.png/1320x2868.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/1f/25/a3/1f25a3e5-f9a3-db5b-01f3-31d0f13ec60d/iPhones__6.9-02.png/1320x2868.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/e8/d8/f9/e8d8f922-0a11-8d57-34e1-33204360c5a1/iPhones__6.9-03.png/1320x2868.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/11/1c/a4/111ca4da-7bcc-e241-28cc-0d5a9937967e/iPhones__6.9-04.png/1320x2868.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/21/ce/7b/21ce7beb-7bb3-5333-8397-8b093f7482f3/iPhones__6.9-05.png/1320x2868.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/84/8c/31/848c3189-1573-7005-b6a5-47190d445bdc/iPhones__6.9-06.png/1320x2868.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/19/41/9e/19419e4d-c47c-c1c7-1141-9b44956623fd/iPhones__6.9-07.png/1320x2868.png) ## Apps Similar to N=1 - [Watch to 5K－Couch to 5km coach](https://apptail.io/app/watch-to-5kcouch-to-5km-coach-vEv/china) - [Flow Lab: Growth Mindset Coach](https://apptail.io/app/flow-lab-growth-mindset-coach-MeG/china) - [Got it Life: AI Mental Health](https://apptail.io/app/got-it-life-ai-mental-health-ZkHc/china) - [Fasting & Nutrition — WAIT](https://apptail.io/app/fasting-nutrition-wait-XtUp/china) - [Biohacking Tracker: Biohackr](https://apptail.io/app/biohacking-tracker-biohackr-wCBv/china) - [Supplement Scanner - RegimeRX](https://apptail.io/app/supplement-scanner-regimerx-wBmw/china) - [Sarvita: Protein Tracker](https://apptail.io/app/sarvita-protein-tracker-wiGw/china) - [Pet AI - Nutrition Tracker](https://apptail.io/app/pet-ai-nutrition-tracker-BPOy/china) - [MyAidKit – Medicine Cabinet](https://apptail.io/app/myaidkit-medicine-cabinet-uoVz/china) - [PharmaAI](https://apptail.io/app/pharmaai-ySdA/china) ## N=1 Available In - [China](https://apptail.io/app/n1-longevity-tracker-nhxz/china) - [Germany](https://apptail.io/app/n1-longevity-tracker-nhxz/germany) - [United Kingdom](https://apptail.io/app/n1-longevity-tracker-nhxz/united-kingdom) - [Philippines](https://apptail.io/app/n1-longevity-tracker-nhxz/philippines) - [United States](https://apptail.io/app/n1-longevity-tracker-nhxz/united-states) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*