# BIGG vs Kaizer

BIGG and Kaizer both sit at 4.9 stars, but that hides the real split: 100% of Kaizer's written reviews are positive against 52% of BIGG's. Kaizer also leads on ads (none vs shown) and update cadence (every 10 days vs every 3 weeks). BIGG's advantage is in-app purchases (none vs 11) and ratings volume (311 vs 9). On price, rating, device support and iOS requirement there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for BIGG against 5.0 for Kaizer. That said, the two scores are not equally well evidenced: BIGG has 311 ratings behind it against 9, so its average is the more settled of the two. Written reviews are what separate them: 52% of BIGG's written reviews are positive against 100% of Kaizer's.

BIGG ships an update every 3 weeks, Kaizer every 10 days. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | BIGG | Kaizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (311 ratings)](https://appshunter.io/ios/app/bigg/id1503408706/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/kaizer-your-personal-trainer/id6748926600/reviews)** |
| Number of ratings | **311** | 9 |
| Positive reviews | 52.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | **Ad-supported** | Freemium |
| Size | 104 MB | 120 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bigg Fit LLC](https://appshunter.io/developer/1541039977) | [KAIZER](https://appshunter.io/developer/1828054877) |

## What reviewers say

### BIGG

[App page](https://appshunter.io/ios/app/bigg/id1503408706)

Manage your fitness journey with this app designed for members of BIGG. Book classes, view daily schedules, set training goals, and access home workouts. Explore various training modalities and equipment-based programs.

**Highlights:** Book classes, View daily schedule, Set training goals, Access home workouts, Equipment-based programming, Multiple training modalities

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 BIGG free?

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

### Is Kaizer free?

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

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

Kaizer is rated higher. BIGG averages 4.9 out of 5 from 311 ratings, while Kaizer averages 5.0 from 9 ratings.

### Do BIGG or Kaizer have ads?

BIGG shows ads; Kaizer does not.

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

BIGG ships an update every 3 weeks, and Kaizer every 10 days. Most recently, BIGG was updated on September 26, 2026 and Kaizer on September 18, 2026.

---

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