# Prev8 — Talk. Log. Improve.

> Talk. Log. Improve. (iPhone/iPad app by Calz Tracker.)

- Source: https://appshunter.io/ios/app/prev8/id6760624898 (this page in markdown: same URL + `.md`)
- Developer: [Calz Tracker](https://appshunter.io/developer/1828606651)
- Category: Lifestyle, Health & Fitness
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 15.0 · 57 MB
- Languages: American English
- Released: 2026-05-24
- Data updated: 2026-08-04
- User reviews in markdown: https://appshunter.io/ios/app/prev8/id6760624898/reviews.md

## What is Prev8?

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Prev8 Pro | $9.99 | per month |



## Version history (last 5 releases)

### 1.3.6 — 2026-07-16

All features now included inside the $9.99 subscription

### 1.3.5 — 2026-07-02

New customisation options for energy twin and Apple CarPay integration.

### 1.3.4 — 2026-06-27

New energy twin features included with Siri.

### 1.3.3 — 2026-06-22

Improved apple CarPlay and Siri connection

### 1.3.2 — 2026-06-18

Apple CarPlay and voice companion improved

## More apps by Calz Tracker

- [PrevX Workspace](https://appshunter.io/ios/app/prevx-workspace/id6773259858)

All apps by Calz Tracker: https://appshunter.io/developer/1828606651

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-04.*