# Trena vs Kaizer

Trena and Kaizer both sit at 4.9 stars, but that hides the real split: 100% of Kaizer's written reviews are positive against 61% of Trena's. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Trena sells 2 in-app purchases, starting at $4.99 per month and Kaizer sells 11 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Trena against 5.0 for Kaizer. Both are backed by a comparable volume of ratings — 23 and 9 respectively. Written reviews are what separate them: 61% of Trena's written reviews are positive against 100% of Kaizer's.

Trena ships an update weekly, Kaizer every 8 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Trena | Kaizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (23 ratings)](https://appshunter.io/ios/app/trena/id6478794745/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/kaizer-your-personal-trainer/id6748926600/reviews)** |
| Number of ratings | **23** | 9 |
| Positive reviews | 60.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Free with in-app purchases | Freemium |
| Size | 78 MB | 109 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Andres Vazquez](https://appshunter.io/developer/1418829424) | [KAIZER](https://appshunter.io/developer/1828054877) |

## What reviewers say

### Trena

[App page](https://appshunter.io/ios/app/trena/id6478794745)

This app generates personalized workout routines to help you achieve fitness goals like muscle gain or body definition. It offers optimized exercises, progress tracking, and the ability to customize routines for home or gym training.

**Highlights:** Personalized workout routines, Muscle gain and body definition plans, Progress tracking, Exercise technique guidance, Customizable routines, Home and gym training options

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mensualidad Premium | $4.99 | per month |
| Six months premium | $22.99 | per 6 months |


### 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 |


## Frequently asked questions

### Is Trena free?

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

### Is Kaizer free?

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

### Which has better reviews, Trena or Kaizer?

Kaizer is rated higher. Trena averages 4.9 out of 5 from 23 ratings, while Kaizer averages 5.0 from 9 ratings.

### Do Trena or Kaizer have ads?

Neither Trena nor Kaizer shows ads.

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

Trena ships an update weekly, and Kaizer every 8 days. Most recently, Trena was updated on October 24, 2026 and Kaizer on October 28, 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.*