# OneOpen vs Sticky Notea

The clearest difference is in-app purchases: Sticky Notea at none against OneOpen's 2. Sticky Notea also leads on iOS requirement (15.0 vs 17.0). OneOpen's advantage is update cadence (every 4 days vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. OneOpen sells 2 in-app purchases, starting at $0.99 per year. Sticky Notea asks for nothing beyond the download.

OneOpen ships an update every 4 days, Sticky Notea every 2 weeks. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OneOpen | Sticky Notea |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 76 MB | 21 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Freedom Dimension (shenzhen) Technology Co., Ltd](https://appshunter.io/developer/6776064465) | [镓聪 杨](https://appshunter.io/developer/6805123875) |

## What reviewers say

### OneOpen

[App page](https://appshunter.io/ios/app/oneopen-file-viewer/id6792251542)

View a wide range of file types, including documents, web pages, CAD drawings, and 3D models, directly on your iPhone and iPad. Easily open and manage archives, EPUBs, emails, and certificates. Offers basic viewing for free with advanced features available through a subscription.

**Highlights:** Multi-format file viewing, HTML and Markdown preview, CAD and 3D model rotation, Archive browsing and extraction, EPUB reader, Certificate inspection, File information display

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Access Annual | $0.99 | per year |
| Advanced Access Lifetime | $2.99 | one-time |


### Sticky Notea

[App page](https://appshunter.io/ios/app/sticky-notea/id6814895879)

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

**In-app purchases:** none


## Frequently asked questions

### Is OneOpen free?

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

### Is Sticky Notea free?

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

### Do OneOpen or Sticky Notea have ads?

Neither OneOpen nor Sticky Notea shows ads.

### Which is updated more often, OneOpen or Sticky Notea?

OneOpen ships an update every 4 days, and Sticky Notea every 2 weeks. Most recently, OneOpen was updated on November 8, 2026 and Sticky Notea on October 31, 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.*