Comparison

Longevity App vs Zest

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Longevity App

Features
Read full description

Take charge of your health and wellbeing with the all-new Longevity App from The Longevity Path. Customized nutrition plans, on-demand fitness programs, guided mobility exercises, guided meditations, and more. Syncs seamlessly with Apple Watch and HealthKit. Join today to add years to your life and life to your years. FEATURES: Personalized Habit & Lifestyle Coaching Personalized Nutrition Plans with Meal Tracking 750+ Delicious, Nourishing Recipes On-Demand Fitness Programs for Any Goal Guided Mobility Programs Guided Breathwork Programs Guided Meditations Daily Motivation & Accountability Reminders Full Integration with Apple Watch/Apple Health, Garmin, FitBit, MyFitnessPal & Others Access to Virtual Consultations with Top Wellness Professionals Download the app today!

About

Zest

Discover your body's internal age and receive personalized insights to slow your aging rate. This app uses at-home tests and machine learning to analyze health metrics like cardiovascular fitness and cognitive function, providing tailored recommendations for improvement.

Highlights
  • Measure Functional Age
  • At-home health testing
  • Personalized health insights
  • Machine learning analysis
  • Tailored recommendations
  • Track aging metrics
Read full description

Ever wondered how old your body actually is on the INSIDE? Discover your Functional Age with Zest. For the first time in history, we have the tools to address aging at its core, and the science to help you to slow your rate of aging. A big part of this is tracking your body’s age on the inside and working to improve your metrics – which is where Zest comes in. Our app and simple at-home test dive deeply into your health, measuring everything from cardiovascular fitness, metabolic health, cognitive function and hormonal health. We use cutting-edge machine learning technology to analyze this data and give you an incredibly accurate measure of your Functional Age (your body’s age on the inside) which you can track and improve over time. Unlike chronological age, which simply counts years, functional age takes a holistic approach and looks at all of your body systems. How it works: 1. Unbox your at-home test: A simple finger prick and a few quick questions to get started. 2. Mail it back: We'll analyze your blood and digital biomarkers to reveal your Functional Age. 3. Results in-App: Dive into personalized insights about your body's performance. 4. Optimize your health: Get tailored recommendations to keep improving your functional age over time. Zest was built by a team of medical doctors, longevity scientists and researchers, and backed up by 100+ clinical trials. We are constantly updating and evaluating our recommendations to ensure we are consistent with the latest research. Are you ready to feel younger for longer? Let's redefine aging together. This product is not intended for diagnostic or treatment purposes and does not constitute healthcare advice. It is designed for healthy individuals to better understand their bodies and avoid future diseases. If you are concerned about any of your results in this app please contact your healthcare provider.

Screenshots

Longevity App4 screens
Zest4 screens

Verdict

The call

The clearest difference is update cadence: Zest at every 3 weeks against Longevity App's every 6 weeks. Longevity App's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Longevity App ships an update every 6 weeks, Zest every 3 weeks. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.

Scorecard2 real differences · 7 level
Longevity App versus Zest: the parameters behind the verdict, then further details
ParameterLongevity AppZest
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.1 — better16
Further details — not scored
Size176 MB23 MB
Age rating4+17+
DeveloperThe Longevity Path Inc.Zest Longevity LTD

In-app purchases

None

Longevity App

No in-app purchases

None

Zest

No in-app purchases

Questions

Is Longevity App free?
Longevity App is free to download, with no in-app purchases.
Is Zest free?
Zest is free to download, with no in-app purchases.
Do Longevity App or Zest have ads?
Neither Longevity App nor Zest shows ads.
Which is updated more often, Longevity App or Zest?
Longevity App ships an update every 6 weeks, and Zest every 3 weeks. Most recently, Longevity App was updated on September 11, 2026 and Zest on September 8, 2026.

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