Zest vs ARQ Optimize
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Measure Functional Age
- At-home health testing
- Personalized health insights
- Machine learning analysis
- Tailored recommendations
- Track aging metrics
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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.
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.
- Wellness journey control
- Progress visualization
- Goal connection
- Device data integration
- Unified health view
- Biometric data tracking
- Intuitive interface
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | Zest | ARQ Optimize |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (10 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 10 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 16 | 16.0 |
| Further details — not scored | ||
| Size | 23 MB | 62 MB |
| Age rating | 17+ | 17+ |
| Developer | Zest Longevity LTD | Phi 1.618 Inc. |
Customer experience
Zest
ARQ Optimize
In-app purchases
Zest
No in-app purchases
ARQ Optimize
No in-app purchases









