# Kaizer vs Bustafit

The clearest difference is in-app purchases: Bustafit at none against Kaizer's 11. Kaizer's advantage is ratings volume (9 vs 2). On price, rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Kaizer against 5.0 for Bustafit. Both are backed by a comparable volume of ratings — 9 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Kaizer ships an update every 8 days, Bustafit fortnightly. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Kaizer | Bustafit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (9 ratings)](https://appshunter.io/ios/app/kaizer-your-personal-trainer/id6748926600/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/bustafit-hypertrophy-tracker/id6786376034/reviews) |
| Number of ratings | **9** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Fortnightly |
| Monetization | Freemium | **Free** |
| Size | 109 MB | 17 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KAIZER](https://appshunter.io/developer/1828054877) | [Monica Andrea Luna Pinilla](https://appshunter.io/developer/6786376036) |

## 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 |


### Bustafit

[App page](https://appshunter.io/ios/app/bustafit-hypertrophy-tracker/id6786376034)

This app helps you maximize hypertrophy training by logging weights, reps, and RIR. It provides practical load and rep recommendations for progressive overload and connects you with your online coach for personalized guidance.

**Highlights:** Log weights, reps, and RIR, Get load and rep recommendations, Connect with online coach, Follow structured routines, AI-assisted video technique review, Track rest with timers, Log nutrition and macros

**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 Bustafit free?

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

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

Kaizer and Bustafit are both rated 5.0 out of 5 on the App Store, from 9 and 2 ratings respectively.

### Do Kaizer or Bustafit have ads?

Neither Kaizer nor Bustafit shows ads.

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

Kaizer ships an update every 8 days, and Bustafit fortnightly. Most recently, Kaizer was updated on October 24, 2026 and Bustafit on October 10, 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.*