Prev8
Talk. Log. Improve.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Energy Twin - PREV8
The first health app that talks to Claude, ChatGPT & Gemini.
Your body has been trying to tell you something.
PREV8 listens.
Meet your Energy Twin - a living, breathing 3D model of you, powered by your real health data. Watch it change as your energy rises and falls. Finally understand what's actually driving how you feel.
Try free for 7 days. Then just US$9.99/month.
No ring. No strap. No hardware needed to start.
WHY PREV8 IS DIFFERENT
Every other health app shows you numbers.
PREV8 tells you what they mean.
Connect PREV8 to Claude, ChatGPT, Grok or Gemini and ask your AI anything - not generic internet answers, but answers built from YOUR data.
"Why am I always tired after lunch?"
"What's stopping me from losing weight?"
"Build me a meal plan based on my energy score."
"What should I tell my naturopath at my appointment?"
Same AI. Completely different answers.
ALREADY TRACKING? PREV8 MAKES IT USEFUL.
Sync Apple Health, Apple Watch, Oura, WHOOP, Garmin and Google Fit in seconds. PREV8 takes everything you're already tracking and gives it a brain.
YOUR PERSONAL AI HEALTH TEAM
Whether you're working on weight loss, muscle building, longevity, hormones or gut health - PREV8 gives your AI the context it needs to actually help you.
Walk into any practitioner appointment with 30 days of objective health data - not just symptoms. Your naturopath, GP, health coach or personal trainer will finally have something real to work with.
CREATE YOUR ENERGY TWIN IN 60 SECONDS
Download free - no payment required
Create your personalised 3D avatar
Connect your devices and start talking
Watch your Energy Twin come to life
JUST TALK - PREV8 DOES THE REST
"Log my breakfast."
"I just had 3 slices of pepperoni pizza."
"Add 2 litres of water."
"How has my recovery been this week?"
PREV8 automatically logs food, hydration, supplements, biomarkers and daily habits - all by voice. No spreadsheets. No forms. No friction.
TRACK WHAT MATTERS
Energy & Recovery
Daily energy score with personalised insights
Sleep, HRV and readiness metrics
Recovery trends over time
Nutrition
Scan meals instantly with AI photo recognition
Voice logging in seconds
Calories, macros and meal timing
Biomarkers & Lab Kit
Urine and saliva pH
Electrical conductivity
Nitrates, hydration indicators
Longevity-focused metrics
AI Connectors
- Claude (Anthropic)
- ChatGPT (OpenAI)
- Grok
- Gemini (Google)
Your data powers every conversation
Devices & Integrations
- Apple Health
- Apple Watch
- Oura Ring
- WHOOP
- Garmin
- Google Fit
BUILT FOR
Busy professionals who are always tired and want real answers.
Athletes who want to optimise recovery and performance.
Parents who want to model healthy habits for their family.
Health-conscious individuals who are done guessing.
Anyone seeing a naturopath, GP or health coach who wants data, not just symptoms.
PRIVATE BY DESIGN
Your data belongs to you. Always.
End-to-end encrypted
Never sold or shared
Never used to train AI models
Export anytime
Share only what you choose
Stop guessing. Start knowing.
Download free. Create your Energy Twin today.
PREV8 - Human Performance. Measured Daily.
Terms of Use: https://prev8.ai/terms
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
All features now included inside the $9.99 subscription
The developer, Calz Tracker, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Purchases
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Contact Info
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
- User Content
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Human Health Manual Pty Ltd
- Size
- 59.8 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Mature or Suggestive Themes
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Prev8 Pro $9.99
- Copyright
- © 2026 Human Health Manual Pty Ltd