HRV Sync vs life.fan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HRV Sync
Effortlessly sync your Heart Rate Variability (HRV) data to the iOS Health app. Connect your fitness account to view HRV trends alongside other health metrics. Prioritizes user privacy with secure token-based login and no data collection.
- One-tap HRV data sync to Health app
- View HRV history and trends
- Secure OAuth login
- Custom date range import
- Privacy-focused data handling
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Track your Heart Rate Variability trends by syncing HRV data to the iOS Health app. HRV Sync connects to your fitness account and imports your daily HRV measurements, making them available alongside all your other health metrics in one place. FEATURES • One-tap sync of HRV data to the Health app • View your HRV history and trends • Secure OAuth login — your password is never stored • Choose custom date ranges to import HOW IT WORKS 1. Log in to your fitness tracker account 2. Select the date range to sync 3. Tap Sync — your HRV data appears in the Health app PRIVACY FIRST • Your credentials are never stored — only secure tokens • Data syncs directly to your device • No data is collected or shared with third parties COMPATIBILITY Compatible with Garmin® fitness devices and accounts. --- This app is an independent product and is not affiliated with, endorsed by, or sponsored by Garmin Ltd. or its subsidiaries. Garmin® is a registered trademark of Garmin Ltd.
life.fan
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life.fan builds a longevity plan around your actual life — then adapts when your life changes. Tell it your goals, your schedule, and your exceptions (Wednesday night out? It's in the plan). It builds a research-backed routine for fasting, training, recovery, and supplements — every recommendation cited to published studies, with links to the sources in the in-app Research library. THE FAST CLOCK RUNS ON REAL MEALS Log food or drink with one tap and the fasting ring tracks what's actually happening in your body — glycogen burn, fat burn, cellular cleanup — not a schedule you set once and forgot. Notifications nudge you based on when you really ate. YOUR SCALE AND WATCH, ONE PLAN Connects read-only to Apple Health: weight, body fat, HRV, resting heart rate, sleep, steps, and workouts. Daily target rings show where you stand. Workouts logged by your watch check themselves off automatically. RESEARCH, NOT VIBES Every rule in your plan carries a citation. If something in your existing routine conflicts with the evidence — cold plunge right after lifting, training at your weakest hour — life.fan surfaces it as a suggested edit, with the study behind it. KNOW YOUR NUMBERS Metabolic age, longevity score, maintenance calories, and lean mass — computed from your own measurements, with the method explained in plain language. SUPPLEMENTS, ASSESSED Type a name or scan a label and get a goal-personalized verdict — beneficial, situational, or caution — backed by sources. Already taking something? It's assessed against your goals, including interactions worth knowing about. MAKE IT YOURS Neon lime or neon pink signal color by default — or pick any custom color. Every rule is editable, any time. life.fan reads from Apple Health and never writes to it. Your health data never leaves your device. MEDICAL DISCLAIMER life.fan provides research-based wellness information and is not a medical device. It does not provide medical advice, diagnosis, or treatment. Always seek the advice of your physician or another qualified health provider in addition to using this app, before beginning any fasting, exercise, or supplement regimen, and before making any medical decisions.
Screenshots
Verdict
The clearest difference is update cadence: life.fan at fortnightly against HRV Sync's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
HRV Sync ships an update every 2 months, life.fan fortnightly. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.
| Parameter | HRV Sync | life.fan |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | Marcin Naglik | Brian Deignan |
In-app purchases
HRV Sync
No in-app purchases
life.fan
No in-app purchases









