Comparison

KAI Studio vs Amped

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

Head to head
About

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.

Highlights
  • Purchase class packs and memberships
  • Browse class schedules
  • Filter classes by type
  • Manage class reservations
  • Stay organized with fitness goals
Features
Read 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.

About

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.

Highlights
  • 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
Features
Read 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

KAI Studio4 screens
Amped4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
KAI Studio versus Amped: the parameters behind the verdict, then further details
ParameterKAI StudioAmped
PriceFreeFree
Rating5.0 (29 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings29 — better—
Update frequencyEvery 3 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size38 MB59 MB
Age rating4+4+
DeveloperKai Studio Concepts LLCWesthaven Holdings LLC

Customer experience

KAI Studio

All ratings29 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Amped

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

KAI Studio

No in-app purchases

2 purchases

Amped

Subscriptions2
  • Amped Monthly7 Days trial$4.991 Month
  • Amped Yearly7 Days trial$29.991 Year

Questions

Is KAI Studio free?
KAI Studio is free to download, with no in-app purchases.
Is Amped free?
Amped is free to download, with in-app purchases available.
Do KAI Studio or Amped have ads?
Neither KAI Studio nor Amped shows ads.
Which is updated more often, KAI Studio or Amped?
KAI Studio ships an update every 3 weeks, and Amped every 6 weeks. Most recently, KAI Studio was updated on October 10, 2026 and Amped on September 30, 2026.

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