# O vs Dream ePRO

The clearest difference is iOS requirement: Dream ePRO at 12.0 against O's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

O ships an update every 4 weeks, Dream ePRO every 2 months. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | O | Dream ePRO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Size | 28 MB | 77 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [铨融 (苏州)医药科技开发有限公司](https://appshunter.io/developer/1253822764) | [Clinflash Healthcare Technology (Jiaxing) Co.,Ltd](https://appshunter.io/developer/1174669463) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-trial-plus/id1423521217)

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

**In-app purchases:** none


### Dream ePRO

[App page](https://appshunter.io/ios/app/dream-epro/id1584312399)

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

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is Dream ePRO free?

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

### Do O or Dream ePRO have ads?

Neither O nor Dream ePRO shows ads.

### Which is updated more often, O or Dream ePRO?

O ships an update every 4 weeks, and Dream ePRO every 2 months. Most recently, O was updated on November 2, 2026 and Dream ePRO on October 25, 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.*