# OSPBB vs Kaizer

The clearest difference is in-app purchases: OSPBB at none against Kaizer's 10. Kaizer's advantage is update cadence (weekly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Kaizer sells 10 in-app purchases, starting at $3.99 per 7 days. OSPBB asks for nothing beyond the download.

OSPBB ships an update every 6 months, Kaizer weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | OSPBB | Kaizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/kaizer-your-personal-trainer/id6748926600/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 20 MB | 109 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [OBRA SOCIAL DEL PERSONAL DE PBBPOLISUR S.A. DE BAHIA BLANCA](https://appshunter.io/developer/1630163933) | [KAIZER](https://appshunter.io/developer/1828054877) |

## What reviewers say

### OSPBB

[App page](https://appshunter.io/ios/app/ospbb/id1630163931)

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

**In-app purchases:** none


### Kaizer

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

This app centralizes your fitness journey, connecting you with your trainer or gym. Track workouts, book classes, chat with your coach, and monitor progress, all within a single platform. It also offers AI-generated workout plans for independent users.

**Highlights:** Connect with your trainer or gym, Book classes and reserve spots, Track detailed workout progress, AI-generated personalized workout plans, Exercise illustrations and smart replacements, Direct chat with trainer, Nutrition plan integration

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

**In-app purchases (10)**

| 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 |


## Frequently asked questions

### Is OSPBB free?

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

### Is Kaizer free?

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

### Do OSPBB or Kaizer have ads?

Neither OSPBB nor Kaizer shows ads.

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

OSPBB ships an update every 6 months, and Kaizer weekly. Most recently, OSPBB was updated on November 3, 2026 and Kaizer on November 5, 2026.

---

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