Comparison

Zest vs ARQ Optimize

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

Head to head
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.

About

ARQ Optimize

This app helps you manage your wellness by visualizing progress and connecting you to your health goals. It integrates device data for a unified view of your health, activity, and biometrics, offering insights in a secure interface.

Highlights
  • Wellness journey control
  • Progress visualization
  • Goal connection
  • Device data integration
  • Unified health view
  • Biometric data tracking
  • Intuitive interface
Features
Read full description

Take control of your wellness journey with ARQ, a comprehensive health and fitness tracking application designed to help you visualize your progress and stay connected to your goals. ARQ seamlessly integrates with your device's capabilities to provide a unified view of your health, activity, and biometric data. Whether you are tracking daily movement or monitoring long-term health trends, ARQ provides the insights you need in a secure, intuitive interface.

Screenshots

Zest4 screens
ARQ Optimize4 screens

Verdict

The call

The clearest difference is ratings volume: ARQ Optimize at 10 against Zest's 1. On price, rating, update cadence and ads 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Zest against 5.0 for ARQ Optimize. That said, the two scores are not equally well evidenced: ARQ Optimize has 10 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
Zest versus ARQ Optimize: the parameters behind the verdict, then further details
ParameterZestARQ Optimize
PriceFreeFree
Rating5.0 (1 ratings)5.0 (10 ratings)
Positive reviews—100.0% of reviews
Number of ratings110 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS1616.0
Further details — not scored
Size23 MB62 MB
Age rating17+17+
DeveloperZest Longevity LTDPhi 1.618 Inc.

Customer experience

Zest

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

ARQ Optimize

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Zest

No in-app purchases

None

ARQ Optimize

No in-app purchases

Questions

Is Zest free?
Zest is free to download, with no in-app purchases.
Is ARQ Optimize free?
ARQ Optimize is free to download, with no in-app purchases.
Which has better reviews, Zest or ARQ Optimize?
Zest and ARQ Optimize are both rated 5.0 out of 5 on the App Store, from 1 and 10 ratings respectively.
Do Zest or ARQ Optimize have ads?
Neither Zest nor ARQ Optimize shows ads.
Which is updated more often, Zest or ARQ Optimize?
Zest ships an update every 3 weeks, and ARQ Optimize every 3 weeks. Most recently, Zest was updated on October 30, 2026 and ARQ Optimize on November 5, 2026.

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