# 15 Minute Challenge vs Kaizmax

The clearest difference is in-app purchases: 15 Minute Challenge at none against Kaizmax's 3. 15 Minute Challenge also leads on iOS requirement (13.0 vs 15.0). Kaizmax's advantage is update cadence (every 2 days vs every 2 weeks) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Kaizmax sells 3 in-app purchases, starting at $6.99 per month. 15 Minute Challenge asks for nothing beyond the download.

15 Minute Challenge ships an update every 2 weeks, Kaizmax every 2 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 15 Minute Challenge | Kaizmax |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Subscription | — |
| Size | 111 MB | 101 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [G-SCALE](https://appshunter.io/developer/6806308085) | [Maxime DERACHE](https://appshunter.io/developer/1886984275) |

## What reviewers say

### 15 Minute Challenge

[App page](https://appshunter.io/ios/app/15-minute-challenge/id6748594926)

Achieve fitness goals and lose weight with personalized home workouts. Get custom training plans, video coaching, and healthy recipes. Transform your body in just 15 minutes a day.

**Highlights:** Personalized workout generation, Video coaching for each exercise, Healthy recipe library, Daily streaks and rewards, Progress tracking, Bodyweight and dumbbell workouts

**Features:** macOS Compatibility

**In-app purchases:** none


### Kaizmax

[App page](https://appshunter.io/ios/app/kaizmax/id6791622983)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kaizmax Premium — Monthly | $6.99 | per month |
| Kaizmax Premium — Annual | $44.99 | per year |
| Kaizmax Premium — Lifetime | $129.99 | one-time |


## Frequently asked questions

### Is 15 Minute Challenge free?

15 Minute Challenge is free to download, with no in-app purchases.

### Is Kaizmax free?

Kaizmax is free to download, with in-app purchases available.

### Do 15 Minute Challenge or Kaizmax have ads?

Both 15 Minute Challenge and Kaizmax show ads.

### Which is updated more often, 15 Minute Challenge or Kaizmax?

15 Minute Challenge ships an update every 2 weeks, and Kaizmax every 2 days. Most recently, 15 Minute Challenge was updated on October 24, 2026 and Kaizmax on October 25, 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.*