# Kaizer vs ATHRIX

The clearest difference is in-app purchases: ATHRIX at none against Kaizer's 11. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kaizer sells 11 in-app purchases, starting at $3.99 per 7 days. ATHRIX asks for nothing beyond the download.

Kaizer ships an update every 10 days, ATHRIX every 5 days. The most recent releases landed on October 5, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Kaizer | ATHRIX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/kaizer-your-personal-trainer/id6748926600/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 121 MB | 45 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [KAIZER](https://appshunter.io/developer/1828054877) | [Alexis Valin](https://appshunter.io/developer/1891341756) |

## What reviewers say

### Kaizer

[App page](https://appshunter.io/ios/app/kaizer-your-personal-trainer/id6748926600)

This AI-powered fitness planner creates hyper-personalized workout routines based on your goals, limitations, and available equipment. It intelligently adapts your training over time to ensure continuous progress and prevent burnout.

**Highlights:** AI-powered routine creation via natural language, Hyper-personalized plans based on user data, Smart progressive overload and weight updates, Exercise replacement suggestions, Professional coaching principles integrated

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $3.99 | per 7 days |
| Pro Monthly | $8.99 | per month |
| Trainer Plan — $39.99 | $39.99 | per month |
| Pro Yearly | $39.99 | per year |
| Trainer Plan — $59.99 | $59.99 | per month |
| Trainer Plan — $79.99 | $79.99 | per month |
| Trainer Plan — $99.99 | $99.99 | per month |
| Trainer Plan — $109.99 | $109.99 | per month |
| Trainer Plan — $129.99 | $129.99 | per month |
| Trainer Plan — $159.99 | $159.99 | per month |
| Pro Lifetime | $89.99 | one-time |


### ATHRIX

[App page](https://appshunter.io/ios/app/athrix/id6761764972)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Kaizer free?

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

### Is ATHRIX free?

ATHRIX is free to download, with no in-app purchases.

### Do Kaizer or ATHRIX have ads?

Neither Kaizer nor ATHRIX shows ads.

### Which is updated more often, Kaizer or ATHRIX?

Kaizer ships an update every 10 days, and ATHRIX every 5 days. Most recently, Kaizer was updated on October 5, 2026 and ATHRIX on October 21, 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.*