Sarvita vs Livity

Both apps take your wearable data and translate it into longevity signals. But they answer very different questions.

Last updated: April 2026 · Back to Sarvita home

TL;DR

Livity is a privacy-first iOS app that turns Apple Watch and Garmin data into a Fitness Age score, sleep stage analysis, training load, and circadian rhythm insights. It answers: how old is my body based on my activity and recovery signals?

Sarvita is an AI longevity coach that calculates biological age across multiple axes — VO2 Max Age, HRV Age, Body Composition Age — and then builds a weekly training and nutrition plan to move those numbers. It answers: what do I actually do this week to add healthy years to my life?

Key difference: Livity scores your current trajectory. Sarvita coaches you to change it.

Feature Comparison

Feature	Sarvita	Livity
Primary goal	Reverse biological age / longevity coaching	Fitness Age scoring + health insights
Biological age model	✅ Composite: VO2 Max Age + HRV Age + Body Comp Age	✅ Fitness Age from 8 metrics (VO2 max, RHR, HRV, sleep, steps, activity, strength)
AI coach	✅ Sar — daily check-ins, weekly plans, nutrition reports	⚠️ Personalized recommendations, no conversational coach
Weekly training plans	✅ Structured around 4 longevity pillars	❌ Tracks training load, doesn't program workouts
Nutrition tracking	✅ AI photo + text → instant macros	❌ No nutrition tracking
Sleep analysis	✅ Via Apple Health	✅ Deep: stages (Deep/REM/Light), quality score, trends
Training load / overtraining	⚠️ AI coach adapts to recovery	✅ Cardio Status (Declining → Overtrained) + alerts
Circadian rhythm / Body Battery	❌ Not explicit	✅ Circadian intelligence + Body Battery
Stress + breathing	⚠️ Coached via check-ins	✅ Stress monitoring + guided breathing
Wearable integrations	Apple Watch via Apple Health	Apple Watch + Garmin + Apple Health
Privacy	✅ No accounts. On-device only. No data collection.	✅ On-device processing + encrypted transmission
Platform	iOS + Apple Watch	iOS 15+ (iPhone/iPad), Apple Watch, Garmin
Pricing	Free + $24.99/yr full access	Free core tracking + optional premium

Two Views of "Biological Age"

🟦 Sarvita — Multi-Axis, Coached

Sarvita breaks biological age into separate, actionable axes: VO2 Max Age (cardiorespiratory fitness), HRV Age (autonomic nervous system), and Body Composition Age (muscle mass and fat). Each axis ties to specific weekly actions the AI coach assigns — so you know exactly which lever to pull.

⬜ Livity — One Fitness Age Number

Livity calculates a single Fitness Age from 8 metrics drawn from validated epidemiological research: VO₂ max, resting heart rate, HRV, sleep duration, daily steps, moderate activity, vigorous activity, and strength training. It's a clean, evidence-backed snapshot — but it doesn't hand you a plan to change it.

Bottom line: Both apps are grounded in legitimate longevity science. The difference is whether you get a score (Livity) or a score plus a coach who builds your week around moving it (Sarvita).

Training: Load Tracking vs Plan Building

🟦 Sarvita — Structured Weekly Plans

✅ Weekly training plans across the 4 pillars of longevity
✅ Zone 2 cardio targets for VO2 Max improvement
✅ Strength programming for muscle mass and metabolic health
✅ Stability and mobility integrated into plans
✅ Sar adapts the plan based on check-ins and recovery

⬜ Livity — Load & Cardio Status

✅ Training load monitoring (intensity, duration, frequency)
✅ Cardio Status guidance: Declining, Maintaining, Building, Peaking, Strained, Overtrained
✅ Overtraining alerts
❌ No programmed workouts or multi-week plans
❌ No prescriptive "do this on Tuesday" guidance

Bottom line: Livity tells you whether your current training is working. Sarvita tells you what to train this week.

Nutrition: A Pillar Livity Doesn't Touch

🟦 Sarvita — Nutrition as a Longevity Pillar

✅ AI photo or text → instant macro breakdown
✅ Protein, carbs, fat tracking tied to training goals
✅ Weekly nutrition reports with longevity context
✅ Nutrition feeds into biological age improvement plan

⬜ Livity — Movement & Recovery Only

❌ No meal logging
❌ No macro tracking
❌ No nutrition insights
⚠️ Fitness Age ignores diet entirely

Bottom line: Diet is one of the strongest modifiable longevity levers. Livity leaves it out; Sarvita puts it at the center.

Recovery Signals: Sleep, Stress, Circadian

🟦 Sarvita — Recovery as Coaching Input

✅ Pulls sleep + HRV from Apple Health
✅ Coach adapts the weekly plan when you're under-recovered
✅ Daily check-ins capture stress and subjective readiness
⚠️ Less emphasis on explicit circadian or Body Battery visuals

⬜ Livity — Recovery as Dashboard

✅ Sleep stage breakdown (Deep, REM, Light) + quality scoring
✅ Circadian rhythm intelligence
✅ Body Battery–style energy budget
✅ Advanced stress monitoring + guided breathing exercises

Bottom line: Livity has a richer recovery dashboard. Sarvita uses recovery as fuel for the next week's plan.

Privacy & Platform

🟦 Sarvita

✅ No account required
✅ All data stays on device via Apple Health
✅ No analytics, no data sales
✅ iOS + Apple Watch

⬜ Livity

✅ On-device processing + encrypted transmission
✅ "We never sell your personal data"
✅ iOS 15+ (iPhone and iPad)
✅ Apple Watch + Garmin + Apple Health

Bottom line: Both apps are solidly privacy-first. Livity is the better pick if you're on Garmin; Sarvita is account-free and Apple-native.

Where Livity Wins

📟 Garmin support: If you wear a Garmin watch, Livity reads it natively — Sarvita is Apple-first.
😴 Sleep depth: Sleep stage analysis and quality scoring are a core Livity strength.
🌓 Circadian + Body Battery: An explicit energy budget and circadian rhythm layer that Sarvita doesn't surface.
🫁 Guided breathing + stress: Built-in stress monitoring with guided breathing exercises.
🏋️ Training load dashboard: Cardio Status (Declining → Overtrained) gives a clean view of where your training is heading.
🗳️ Community roadmap: Users vote on feature priorities instead of a corporate backlog.

Where Sarvita Wins

🧬 Multi-axis biological age: VO2 Max Age, HRV Age, and Body Composition Age — each tied to a specific lever you can pull, not one opaque Fitness Age number.
🤖 Conversational AI coach: Sar builds weekly plans, runs daily check-ins, and adapts to your recovery. Livity gives you recommendations; Sarvita gives you a coach.
🗓️ Structured weekly plans: Specific workouts for Zone 2, strength, VO2 Max, and stability — the 4 longevity pillars — instead of training-load monitoring alone.
🥗 Nutrition: Livity doesn't track food. Sarvita's AI meal logging connects diet directly to your biological age plan.
🎯 Outcome-focused: Sarvita is built around the single question "how do I lower my biological age?" — every feature feeds that answer.
🔒 Account-free: No sign-up at all; data never leaves your device.

Which One Is Right for You?

Choose Sarvita if you:

✅ Want a structured weekly plan, not just a score
✅ Care about nutrition as part of your longevity system
✅ Want an AI coach that adapts week over week
✅ Think in terms of VO2 Max Age, HRV Age, and Body Comp Age separately
✅ Prefer no accounts and fully on-device data

Try Sarvita Free →

Choose Livity if you:

✅ Wear a Garmin watch (or want Garmin + Apple Watch parity)
✅ Want deep sleep stage analysis and a Body Battery–style view
✅ Need explicit overtraining alerts and a Cardio Status dashboard
✅ Prefer a single Fitness Age number over multi-axis scoring
✅ Don't want food tracking or conversational coaching

Visit Livity →

Frequently Asked Questions

Can I use Sarvita and Livity together? ▼

Yes. Both read from Apple Health, so they don't conflict. Livity can give you a sleep/circadian dashboard while Sarvita runs your weekly coaching and nutrition. Most users eventually pick one based on whether they want a score or a plan.

Is Fitness Age the same as biological age? ▼

They're related but not identical. Livity's Fitness Age is a single score derived from 8 activity and recovery metrics. Sarvita's biological age is broken into multiple axes — VO2 Max Age, HRV Age, Body Composition Age — each connected to a different intervention. If you want one clean number, Livity is simpler; if you want to target specific systems, Sarvita's model is more actionable.

Does Sarvita work with Garmin? ▼

Sarvita is Apple-first and reads from Apple Health. If your Garmin syncs into Apple Health (via the Garmin Connect app), those metrics flow into Sarvita. Livity has more direct Garmin support, so heavy Garmin users may prefer it for raw device integration.

Does Livity track nutrition? ▼

No. Livity's Fitness Age is calculated from activity, sleep, HRV, and strength training — diet is not part of the model. If food tracking matters to you, Sarvita's AI photo/text meal logging is the better fit.

Which app is better for someone new to longevity? ▼

Sarvita. Beginners usually benefit more from being told what to do than from interpreting a dashboard. Livity gives you the signal; Sarvita gives you the plan. If you already know how to train and just want a well-designed score + recovery view, Livity works nicely too.

Turn Your Score Into a Plan

Download Sarvita free. Get your biological age in minutes and start a weekly coaching plan built to lower it — not just measure it.

Download Sarvita Free

Available on iOS. Requires iPhone with Apple Health.