# O vs eOutcome

The clearest difference is update cadence: O at every 4 weeks against eOutcome's every 8 months. O also leads on device support. eOutcome's advantage is iOS requirement (11.0 vs 15.0). On price 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, eOutcome every 8 months. The most recent releases landed on September 26, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | O | eOutcome |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 4 weeks** | Every 8 months |
| Size | 28 MB | 100 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 12+ | 17+ |
| Developer | [铨融 (苏州)医药科技开发有限公司](https://appshunter.io/developer/1253822764) | [Zhejiang Taimei Medical Technology Co., Ltd.](https://appshunter.io/developer/728095123) |

## 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


### eOutcome

[App page](https://appshunter.io/ios/app/eoutcome/id6449018115)

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is eOutcome free?

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

### Which is updated more often, O or eOutcome?

O ships an update every 4 weeks, and eOutcome every 8 months. Most recently, O was updated on September 26, 2026 and eOutcome on September 15, 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.*