KAI Studio vs Amped
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KAI Studio
Easily browse and purchase class packs or membership options. View the schedule, filter classes by type, and manage your reservations to stay organized and committed to your fitness goals.
- Purchase class packs and memberships
- Browse class schedules
- Filter classes by type
- Manage class reservations
- Stay organized with fitness goals
Read full descriptionHide full description
Features: -Purchase Class Packs and Memberships Easily browse and purchase our class packs or membership options -View our schedule Filter classes by type to find the perfect fit for your routine. -Manage your reservations Book your class reservations with ease. Keep track of your upcoming classes and manage your schedule to stay organized and committed to your fitness goals.
Amped
This app translates daily choices into tangible life expectancy gains, backed by scientific research. It tracks over 60 health markers, including exercise, sleep, and nutrition, to provide a personalized projection of your lifespan and biological age. Your health data remains private and on your device.
- Personalized lifespan projection
- Tracks 60+ health markers
- Connects with Apple Health
- Real-time 'Time Banked' growth
- Links calculations to peer-reviewed studies
- Privacy-focused data storage
Read full descriptionHide full description
What if you could see how every decision affects how long you'll live? Amped transforms your daily choices into something tangible: TIME — actual minutes and years added to your life, calculated from dozens of peer-reviewed studies. Your morning run? +12 minutes. Bad night's sleep? -26 minutes. That third drink? You'll see. THE SCIENCE IS CLEAR Research shows healthy habits can add at least 12+ years to your lifespan with an optimal lifestyle. But knowing that isn't the same as feeling it. Amped turns abstract statistics into a personal, real-time projection of your life. HOW IT WORKS - Connect your Apple Health for automatic tracking - Answer research-backed health questions - Get your personalized lifespan projection - Watch your "Time Banked" grow daily WHAT YOU'LL TRACK EXERCISE — Steps, cardio fitness, strength training, flexibility SLEEP — Duration, quality, recovery signals, HRV & NUTRITION — Diet quality, hydration, metabolic health Plus 60+ health markers including blood pressure, stress, social connection, and preventive screenings. YOUR LIFE PROJECTION - See how your current habits project into the future: - Total years gained at your current pace - 5-year and 10-year milestone previews - Projected lifespan & Biological age BACKED BY SCIENCE Every calculation links to peer-reviewed research from: - JAMA, The Lancet, NEJM - Harvard, Stanford, leading medical institutions - Data from millions of study participants over decades PRIVACY FIRST All your health data stays on your device. We never upload, sell, or share your information. Your lifespan is your business. WHY AMPED? Most health apps tell you what you did. Amped shows you what it means. The goal isn't to track more data. It's to know that the effort you're putting in is actually adding up to something real: more time with the people you love. Start your 7-day free trial today. See your first impact in minutes. SUBSCRIPTION Full access to Amped requires a subscription after a 7-day free trial. - Monthly: $4.99/month - Yearly: $29.99/year ($2.49/month) Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscription in your App Store account settings. No charge during the free trial period. Terms of Use: https://ampedlifespan.com/terms-of-use.html Privacy Policy: https://ampedlifespan.com/privacy-policy.html
Screenshots
Verdict
The clearest difference is in-app purchases: KAI Studio at none against Amped's 2. KAI Studio also leads on update cadence (every 3 weeks vs every 6 weeks). Amped's advantage is device support (3 vs 1). On price, review sentiment, ads 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. Amped sells 2 in-app purchases, starting at $4.99 per month. KAI Studio asks for nothing beyond the download.
KAI Studio ships an update every 3 weeks, Amped every 6 weeks. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.
| Parameter | KAI Studio | Amped |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (29 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 29 — better | — |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 38 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Kai Studio Concepts LLC | Westhaven Holdings LLC |
Customer experience
KAI Studio
Amped
In-app purchases
KAI Studio
No in-app purchases
Amped
- Amped Monthly7 Days trial$4.991 Month
- Amped Yearly7 Days trial$29.991 Year









