KronixAI
AI-Powered Health & Fitness
Only for iPhone
Free
iPhone
KronixAI is the AI health companion built for a longer, stronger life
Most health apps track one thing. KronixAI tracks everything that matters — sleep, fitness, nutrition, and the lifestyle factors around them — and uses AI to reason across all of it at once. When your gym performance drops, KronixAI connects it to a week of short deep sleep and Monday's late, heavy dinner. Come back from a trip, and it works out how to fix your jet lag without derailing your training. Few apps are as personalized — or as attuned to your goals and schedule — as this.
WHAT MAKES KRONIXAI DIFFERENT
Longevity lens — every insight is framed through the science of biological aging: metabolic health, inflammation, cellular repair, mitochondrial function, hormonal balance.
Centralized health data — one app for every pillar plus your injury state, and one AI that sees all of it.
Cross-pillar intelligence — automatically explains how last night's sleep affected today's session, how your nutrition is slowing an injury's recovery, or how a big night out is showing up in your HRV.
It remembers — your whole history is on tap ("what was I benching in April?", "how has my sleep trended this year?"), and it learns your personal baselines and patterns — like how travel affects your sleep — instead of judging you against population averages.
Conversational by default — log data, ask questions, and get recommendations in plain language. Snap a photo of a meal and the macros are estimated for you.
Daily scores and insights — wake up to a readiness score for today, a long-term trajectory score, and the single highest-impact thing to do — generated fresh each morning from your data.
Visual dashboards — rich charts and trends for every pillar; watching your deep sleep, squat progression, or protein intake over time is core to the experience, right alongside the chat.
Agentic — the AI doesn't just answer; it logs your data, edits entries, builds and saves training programs and meal plans, and takes action for you.
WHAT IT TRACKS
Sleep — stages, HRV, resting heart rate (via Apple Health)
Fitness — per-set strength data, volume, and progression; Apple Watch workouts
Nutrition — meals, macros, and meal timing
Injury & resilience — injury sites, pain over time, and rehab/prehab consistency
Body composition — weight, body fat, and muscle mass
Life — activities, travel, illness, and factors like alcohol, stress, and cycle that affect the rest
Built for wherever you're starting from — brand new to exercise, an experienced lifter optimizing, improving at a sport, fixing your sleep, or simply investing in a healthier future.
KronixAI is powered by Claude, Anthropic's AI. Your health data is used solely to generate your insights and is never sold.
Not a substitute for professional medical advice.
Ratings & Reviews
An optional morning insight nudge — turn it on in Profile or when prompted.
The developer, WESLEY WEI-FAHN HUANG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- WESLEY WEI-FAHN HUANG
- Size
- 51.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Frequent
Medical Treatment information
Infrequent
Profanity or Crude Humor
Mature or Suggestive Themes
Alcohol, Tobacco, Drug Use or References
Contains
User-Generated Content
Health or Wellness Topics
- Copyright
- © 2026 KronixAI