Gyroscope vs Zest
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gyroscope
This app offers a comprehensive view of your personal health data, integrating nutrition, exercise, and sleep. Utilize its AI coach for personalized insights and track your progress with hundreds of available metrics and device integrations. Your data is private and never sold, with a focus on improving your overall well-being.
- Health Camera for food and drink tracking
- AI-powered health insights and coaching
- Syncs with thousands of devices and wearables
- Hundreds of health and wellness trackers
- Private data storage with no ads
- Personalized reports and goal setting
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Gyroscope is not just an app, but a new operating system for the human body. You’ll be able to see everything about your biology, and update your internal systems for our modern world. Better nutrition, better exercise, better living with AI. C A M E R A With the world’s first Health Camera, tracking your life is as simple as taking a photo. Use the app to take a photo of everything you eat (and drink) to get realtime and accurate data. Gyroscope is designed to be the most accurate and convenient way to track your eating — combining photos, text labels, scale data, nutrition labels and your personalizations for easy and intuitive tracking that learns with you. U P G R A D E Gyroscope is designed for maximum privacy and quality. There are no ads, and your data is never sold. Just one simple membership powers the service for everyone. Everyone can start with the 4 essential trackers (Places, Mood, Sleep and Food), or join premium to unlock all trackers and coaching. Gyroscope One adds hundreds of trackers and integrations to see everything in one place: nutrients, fasting, meditation, workouts, travel, sleep, glucose, productivity. You can automatically sync with thousands of devices like Apple Watch, wearables, smart mattresses, scales, glucose monitors, and more. And now you’re not alone. Your AI coach in the app helps you make sense of it all with insights, notifications, and custom reports tailored to you and your goals. R E V I E W S “Gyroscope is the only product that makes tracking my life easy. With a glance I can tell what I'm excelling at, and what I need to work on. I don't go a day without checking the app.” – Brandon “Tracking my life in gyroscope helped me lose 75lbs!” “The insights I get using Gyroscope are priceless. Every day I am able to make more informed decisions that make me a happier and healthier person.” – Chris “Love the ability to track my location without sacrificing my privacy to Facebook and Google.” – Sawyer “I think I've been using Gyroscope for a while now and it's by far one of the subscriptions I have that brings me more joy.” – Lucas M E M B E R S H I P Create an account to start with the basics, including free quizzes and consultations, 4 complimentary trackers, and 30 days of storage. Upgrade to Gyroscope One membership for hundreds of more trackers, AI coach, unlimited storage, fat loss protocol, integrations, and more. Y O U R A C C O U N T Gyroscope requires an account to sync and view your data. You can access dashboards in the app and website, and ensures your data is never lost, even if you reinstall the app or get a new iPhone. Your data will NEVER be sold, and is ONLY used for your benefit. We also show no ads. We only make money through the premium subscriptions, so your upgrade helps to power the system. Your data is completely private by default, but you have the option to add friends or make your profile public if you want to share. You can also delete your entire account at gyrosco.pe/delete B I L L I N G Gyroscope One is an auto-renewing subscription, billed with a simple membership that costs just about $1 a day. Subscribe and pay through your iTunes account. Monthly subscriptions automatically renew monthly through your iTunes account. Auto-renew may be turned off in your iTunes Account Settings after purchase. Cancellation of the current active subscription period is not allowed. When you cancel the auto-renewal, access to the app features will expire at the end of the current payment period, and remaining trial is forfeit. Subscription automatically renews unless auto-renew is turned off at least 24-hours before end of current period. Account renewal will be charged within 24-hours prior to end of current period. Full Terms of Service & Pricing: https://gyrosco.pe/terms/ How we protect your privacy: https://gyrosco.pe/privacy/
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.
Screenshots
Verdict
The clearest difference is in-app purchases: Zest at none against Gyroscope's 10. Zest also leads on ads (none vs shown). Gyroscope's advantage is ratings volume (52 vs 1) and update cadence (every 9 days vs every 3 weeks). On price, rating, device support 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
Both are free to download. Gyroscope sells 8 in-app purchases, starting at $9.00 per 7 days. Zest asks for nothing beyond the download.
Zest holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Gyroscope has 52 ratings behind it against 1, so its average is the more settled of the two.
Gyroscope ships an update every 9 days, Zest every 3 weeks. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.
| Parameter | Gyroscope | Zest |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (52 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 65.2% of reviews | — |
| Number of ratings | 52 — better | 1 |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 16.6 | 16 — better |
| Further details — not scored | ||
| Size | 153 MB | 23 MB |
| Age rating | 17+ | 17+ |
| Developer | Gyroscope Innovations | Zest Longevity LTD |
Customer experience
Gyroscope
Zest
Bugs and requests
Gyroscope
Reported bugs
3 issues- Frequent app crashes and freezes
- Syncing issues with connected apps and devices
- Inaccurate step and activity tracking
Requested features
4 requests- Improved data export and integration options
- Customizable data views and reporting
- Better support for night shift/irregular sleep schedules
- Expanded food logging and nutrition analysis
Zest
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Gyroscope
- Gyroscope One$9.007 Days
- Gyroscope One2 variants$29.991 Month
- Gyroscope One7 Days trial$29.991 Month
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- Gyroscope One$39.001 Month
- Gyroscope Pro (Legacy)$99.006 Months
- Gyroscope Ultra$149.003 Months
- Gyroscope Pro$149.991 Year
- Gyroscope One2 variants$299.001 Year
Zest
No in-app purchases









