Prev8 vs FitClean
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Prev8
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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
FitClean
Track your GLP-1 medication, side effects, meals, protein, water, and weight all in one place. Visualize medication levels and see how your treatment impacts your health journey.
- Log GLP-1 medication doses and schedules
- Track side effects with severity
- Estimate medication levels over time
- Scan meals for nutrition estimates
- Log water and activity
- Combined timeline of all logged data
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Snap a photo of your plate and get calories, protein, carbs and fat in seconds. FitClean is an AI-powered food and calorie tracker built to make logging fast enough that you'll actually stick with it. FOOD LOGGING - Photo scan: nutrition estimate from a picture of your plate - Barcode and label scan for packaged food - Menu scan: photograph a restaurant menu and see dishes that fit your targets - Manual entry and search NUTRITION - Calories, protein, carbs and fat - Separate daily protein target with its own progress view - Daily and weekly summaries WEIGHT - Weight entries with a smoothed trend line - BMI and total change from your starting weight - Body measurements and progress photos - Weekly and monthly progress HYDRATION AND ACTIVITY - Water intake logging - Workout and activity logging COMBINED TIMELINE - Food, protein, water and weight on one timeline - Makes it easier to see which meals or weeks line up with how you felt WHY PEOPLE STAY - Everything in one app instead of four - Fast enough to keep up on a busy day - Reminders that help without nagging - Built for accuracy, not guesswork FitClean keeps the record so you don't have to. PRIVACY & TERMS Privacy Policy: https://edutrackers.com/privacy_policy Terms of Use: https://edutrackers.com/page67526499.html
Screenshots
Verdict
The clearest difference is ads: Prev8 at none against FitClean's shown. Prev8 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.6). On price, update cadence and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Prev8 sells 1 in-app purchase, starting at $9.99 per month and FitClean sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Prev8 | FitClean |
|---|---|---|
| Price | Free | Free |
| Positive reviews | โ | 100.0% of reviews |
| Update frequency | Every 5 days | Every 5 days |
| Ads | No โ better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | โ | Free with in-app purchases |
| Devices | iPhone, iPad, iPod โ better | iPhone |
| Requires iOS | 15.0 โ better | 18.6 |
| Further details โ not scored | ||
| Size | 57 MB | 42 MB |
| Age rating | 12+ | 4+ |
| Developer | Calz Tracker | Ilia Chernikov |
In-app purchases
Prev8
- Prev8 Pro7 Days trial$9.991 Month
FitClean
- Month3 Days trial$3.991 Month
- Yearly3 Days trial$29.991 Year









