AgeMaster AI vs Kai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AgeMaster AI
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Discover the secrets of your four different age types with AgeMaster AI! Understand how heart activity, metabolism, and genetics influence your health and alter your real age. AgeMaster will analyze your results and provide personalized recommendations to help you start living a healthier and more fulfilling life. Begin your journey to better health today! AgeMaster AI is your personal health assistant, utilizing a team of health experts and the power of artificial intelligence to deliver in-depth analyses of different age types based on biomarkers collected and analyzed daily from your mobile device, smartwatch, or smart ring. The analysis also incorporates laboratory and other types of tests, such as impedance measurements. AgeMaster AI is designed to help you understand how your lifestyle, nutrition, sleep, and physical activity impact your health. AgeMaster AI provides personalized statistics and calculations, such as: • Functional Heart Age: Track the functional age of your heart based on key health indicators. • Metabolic Age: Understand how efficiently your body functions in terms of metabolism and how it affects your metabolic age. • Genetic Age: Through a few basic laboratory tests, discover how your genetic information manifests in your body’s key indicators and how it influences your genetic age. In AgeMaster AI, users can upload their health files or workout data directly into the app, which are analyzed to generate detailed health reports. Whether you want to take control of your health, optimize your performance in fitness, work, or home life, or simply understand how fast your body is aging, AgeMaster AI provides powerful, data-driven tools. Features: • Detailed Biomarker Analysis: Data from your mobile phone, smartwatch, or ring, as well as metabolic tests and laboratory indicators, will provide a precise overview of how your four types of age—chronological, functional, metabolic, and genetic—relate to each other. • File Upload for Analysis: Upload your health files and data to receive a comprehensive health analysis and personalized recommendations for a healthier and more fulfilling life. • Personalized Health Reports: Get detailed reports tracking your health over time. • AI Assistant: Get answers to all your questions related to biomarkers, aging, health, movement, workouts, nutrition, longevity, and more. • Intuitive User Interface: Easily navigate daily, weekly, and monthly reviews of your most important data. Take control of your health with AgeMaster AI – personalized, data-driven analysis and advice just a click away. By downloading this app, you agree to: Apple’s Standard Terms of Use -> https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy -> https://agemaster.ai/privacy-policy Terms of Use -> https://agemaster.ai/terms-of-use/
Kai
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Meet Kai, the AI friend who texts you mid-scroll. You meant to check one thing. Now you've been scrolling for an hour. Kai helps you catch that moment and get back to what you wanted to do—with humor, a little teasing, and accountability that feels personal. A personality worth replying to Kai lives in iMessage. Expect short conversations, quick wit, and a nudge about the things you said mattered. Tell him what you're working toward, whether it's studying, finishing a project, or getting to bed. Text first. Block when needed. When you've agreed on a focus plan, Kai can temporarily block a selected app if you keep scrolling past his check-ins. You can also ask for a lock when you need help getting started, or end one in the app. Your phone. Your rules. Choose which apps Kai watches with Apple's Screen Time permission. Change your selection whenever you want. See your screen-time milestones in the app and manage your connection, permissions, and locks in one place. How your data is used Kai receives the messages you send to Kai—not your other conversations or content you view or type in other apps. With your permission, OpenAI processes your messages, relevant history, shared details and selected app usage-threshold data to generate replies and check-ins. SendBlue delivers your messages. You can decline or withdraw AI sharing in Machinery > ai privacy. Delete your active Kai account data in the app or by texting "delete everything" and confirming; retention exceptions are explained in the Privacy Policy. Getting started 1. Install Kai and tap "text kai" to start a conversation in iMessage. 2. Enter the code Kai sends you and subscribe through Apple. 3. Allow Screen Time access and choose the apps you want help with. Born in a Stanford dorm. Built for life outside your feed. Subscription A paid monthly subscription is required for app blocking and ongoing accountability. The price is shown before you purchase. Payment is charged to your Apple Account. Your subscription renews automatically unless canceled at least 24 hours before the current period ends. Manage or cancel it in your App Store account settings. Terms of Use: https://kai-production-cba6.up.railway.app/terms Privacy Policy: https://kai-production-cba6.up.railway.app/privacy
Screenshots
Verdict
AgeMaster AI and Kai are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. AgeMaster AI sells 2 in-app purchases, starting at $4.99 per month and Kai sells 1 in-app purchase, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | AgeMaster AI | Kai |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 21 MB | 3 MB |
| Age rating | 17+ | 12+ |
| Developer | Verum Clinical EOOD | ALEKSEY STEFANOV RUSENOV |
In-app purchases
AgeMaster AI
- Standard Montly14 Days trial$4.991 Month
- Standard Yearly14 Days trial$49.991 Year
Kai
- Kai$19.991 Month









