# O vs Clinflash eTMF

O and Clinflash eTMF are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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, Clinflash eTMF monthly. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | O | Clinflash eTMF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Size | 28 MB | 47 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| 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


### Clinflash eTMF

[App page](https://appshunter.io/ios/app/clinflash-etmf/id6473766016)

**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 Clinflash eTMF free?

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

### Do O or Clinflash eTMF have ads?

Neither O nor Clinflash eTMF shows ads.

### Which is updated more often, O or Clinflash eTMF?

O ships an update every 4 weeks, and Clinflash eTMF monthly. Most recently, O was updated on October 12, 2026 and Clinflash eTMF 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.*