# Kaizen OS vs E

The clearest difference is ads: E at none against Kaizen OS's shown. E also leads on update cadence (every 2 months vs every 8 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Kaizen OS ships an update every 8 months, E every 2 months. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Kaizen OS | E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 10 MB | 23 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tech Solutions International Limited](https://appshunter.io/developer/1501469046) | [POP RECREU ELECTRONIC SDN.BHD.](https://appshunter.io/developer/1704768384) |

## What reviewers say

### Kaizen OS

[App page](https://appshunter.io/ios/app/kaizen-os/id1472730056)

**Features:** macOS Compatibility

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-relife/id6463694369)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kaizen OS free?

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

### Is E free?

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

### Do Kaizen OS or E have ads?

Kaizen OS shows ads; E does not.

### Which is updated more often, Kaizen OS or E?

Kaizen OS ships an update every 8 months, and E every 2 months. Most recently, Kaizen OS was updated on September 24, 2026 and E on September 18, 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.*