No Personal Data on Servers
All health metrics and logs are stored exclusively on your device. There is no "ReVersion Account" — we don't operate any cloud database for your health data.
In Development — iPhone · iPad · Apple Watch
UnlockingYounger Me
ReVersion is a privacy-first health companion for iPhone, iPad, and Apple Watch. Track fasting, nutrition, hydration, and mood — synced with Apple HealthKit and stored only on your device. Built to help you revert to your peak state.
📱iOS 26+📋iPadOS 26+⌚watchOS 26+
0
Data on Our Servers
100%
HealthKit Native
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Health Metrics
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Goal: You
Privacy Manifesto
Local-First. Zero-Knowledge.
Your health data is yours alone. ReVersion is built on the principle that no one — not even us — should have access to your personal health metrics.
HealthKit as the Source of Truth
Apple HealthKit is the primary data store. Your health history stays within Apple's encrypted ecosystem — portable, private, and always under your control.
Stateless AI Processing (Phase 2)
When the AI Secretary launches, any data sent for processing will be stripped of personal identifiers, processed without storage, and never used for model training.
Local-First Storage
All app data lives on your device via SwiftData and HealthKit. No cloud sync, no accounts, no third-party analytics. Your health data stays on your device.
Zero-Knowledge Architecture — Built with SwiftUI, SwiftData, and HealthKit. No cloud database. No accounts. No tracking. Works across iPhone, iPad, and Apple Watch.
Apple Ecosystem
Built for iPhone, iPad & Apple Watch.
ReVersion is built with SwiftUI and shares one codebase across iPhone, iPad, and Apple Watch. All health data syncs through HealthKit, and everything is stored locally on your device.
📱
iPhone
The core ReVersion experience — start a fast, log meals, track hydration and mood, and check your daily health summary, all designed for one-handed use.
Fasting Timer · Meal Logging · Mood Journal · Health Summary
📋
iPad
The same ReVersion features with an expanded layout — view detailed trend charts, compare metrics side by side, and review a full-width nutrition breakdown.
Trend Charts · Metric Comparisons · Nutrition Breakdown · Full Layout
⌚
Apple Watch
Quick-glance health data on your wrist — view your active fast status, log water intake, and see today's health summary without reaching for your phone.
Fasting Status · Water Logging · Health Glance · Complications
HealthKit Data Engine
Inbound — Source of Truth
- Activity & Workouts — Calories, heart rate, workout types
- Sleep Analysis — Deep/REM/Core stages
- Body Metrics — Weight & body fat trends
Outbound — Bi-Directional Logging
- Hydration — Water intake in mL/oz
- Nutrition — Protein, carbs, and fats
- Mood — HKStateOfMind API entries
- Fasting — Duration logged via custom entries
Core Features
Every Metric. One Feedback Loop.
ReVersion tracks fasting, nutrition, hydration, sleep, mood, and body metrics — all synced with Apple HealthKit. Personalised AI insights are planned for Phase 2.
Smart Fasting Timer
Start and track intermittent fasts with a real-time countdown. The timer maps your progress through metabolic states — Sugar Burn, Keto Transition, and Deep Autophagy — so you know what your body is doing.
Phase 2: AI-suggested fasting windows based on your sleep and mood patterns.
Nutrition & Hydration
Log protein, carbs, fats, and water intake. All entries are written back to Apple HealthKit so your data stays in one place and is visible across any HealthKit-compatible app.
Phase 2: Contextual nutritional tips based on your logged data.
Sleep & Body Metrics
Reads sleep stages (Deep, REM, Core), body weight, and workout data from HealthKit. View how rest and recovery connect to your other health metrics.
Phase 2: Correlation insights between sleep quality and health trends.
Mood Tracking
Log your emotional state on a 5-level scale with contextual tags and optional notes. Over time, surface patterns between mood, fasting progress, and sleep.
Phase 2: Pattern detection for stress triggers and low-energy cycles.
HealthKit Bi-Directional Sync
Reads activity, sleep, and body data from Apple Health. Writes hydration, nutrition, mood, and fasting data back — keeping everything in one trusted ecosystem.
All HealthKit access requires your explicit per-type permission.
Vitality Score (Phase 2)
A planned composite score that will reflect your fasting consistency, nutrition balance, hydration, mood, and activity — giving you a quick daily snapshot.
Coming in Phase 2 with personalised scoring based on your HealthKit data.
AI Secretary — Coming in Phase 2
Your Personal Health Intelligence
The AI Secretary is a planned feature that will analyse your HealthKit entries to provide personalised, actionable health guidance — directly inside the app. All data will be PII-stripped and processed statelessly.
reversion-ai-secretary
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Logged: Mood — Low energy · Fasting — 16h · Sleep — 5.2h
AI
I noticed your sleep was 34% below your average last night. Combined with your low mood, here's what I recommend:
- ●Shorten today's fast to 12h — Your cortisol is likely elevated. A shorter window will help recovery.
- ●Prioritize protein at your first meal — This stabilizes serotonin production for mood uplift.
- ●Target 7.5h sleep tonight — I'll send a wind-down reminder at 10 PM.
Preview of planned AI Secretary experience
Pattern DetectionStress Trigger AlertsDynamic AdjustmentsSleep CorrelationPII-Stripped ProcessingMood-Fasting Sync
Roadmap
The Path to Your Peak State
We're building ReVersion in public. Here's what's coming.
Phase 1In Progress
Foundation
- Fasting timer that maps progress to metabolic states
- Meal, hydration & mood logging with HealthKit write-back
- Read activity, sleep & body metrics from HealthKit
- Local-first storage — no accounts, no cloud database
Phase 2Upcoming
Intelligence
- AI Secretary — context-aware health chat
- Vitality Score — single composite health metric
- Live Activities & Dynamic Island during fasts
- Home Screen & Lock Screen widgets
Phase 3Planned
App Store Launch
- TestFlight beta for waitlist members
- Public release on iPhone, iPad & Apple Watch
- Siri Shortcuts for quick logging via voice
- Long-term trend analysis & exportable reports
FAQ
Frequently Asked Questions
Everything you need to know about ReVersion.
What is ReVersion?
ReVersion is a privacy-first health companion for iPhone, iPad, and Apple Watch. It helps you track fasting, nutrition, hydration, mood, sleep, and body metrics — all synced with Apple HealthKit and stored locally on your device.
Does ReVersion collect my health data?
No. All health data stays on your device within HealthKit and SwiftData. ReVersion does not transmit personal health data to any server. When the AI Secretary launches in Phase 2, any data sent for processing will be stripped of personally identifiable information.
Which devices does ReVersion support?
ReVersion supports iPhone (iOS 26+), iPad (iPadOS 26+), and Apple Watch (watchOS 26+). It is built with SwiftUI and uses HealthKit for health data and SwiftData for local storage.
What is the AI Secretary?
The AI Secretary is a planned feature for Phase 2. It will use your logged health data — fasting, sleep, mood, and nutrition — to provide contextual recommendations within the app. All data sent for AI processing will be stripped of personal identifiers.
Is ReVersion free?
ReVersion is currently in development. You can join the waitlist for free to get priority beta access via TestFlight. Pricing details will be announced closer to the App Store launch.
How does ReVersion use Apple HealthKit?
ReVersion reads activity, sleep, body metrics, and workout data from HealthKit and writes hydration, nutrition, and mood data back. All access requires your explicit per-type permission and can be revoked at any time in iOS Settings.
Phase 1 — Waitlist Open
Ready to Unlock Your Younger Me?
Join the early access list and be among the first to try ReVersion on your iPhone, iPad, and Apple Watch. No spam — just your invitation when we're ready.
Free to joinNo spam, everPriority beta access