# KAI Studio vs Amped

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.

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.

## The numbers

| Metric | KAI Studio | Amped |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (29 ratings)](https://appshunter.io/ios/app/kai-studio/id6747728663/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 38 MB | 59 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kai Studio Concepts LLC](https://appshunter.io/developer/1822641636) | [Westhaven Holdings LLC](https://appshunter.io/developer/1827716142) |

## What reviewers say

### KAI Studio

[App page](https://appshunter.io/ios/app/kai-studio/id6747728663)

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:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### Amped

[App page](https://appshunter.io/ios/app/amped-lifespan-tracker/id6748860588)

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:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Amped Monthly | $4.99 | per month |
| Amped Yearly | $29.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*