# i Open EDOC vs KooSync

The clearest difference is update cadence: KooSync at every 3 weeks against i Open EDOC's every 10 months. i Open EDOC's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 16.0). On price, 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.

i Open EDOC ships an update every 10 months, KooSync every 3 weeks. The most recent releases landed on October 9, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | i Open EDOC | KooSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/i-open-edoc/id498486254/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 5 MB | 154 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Datu Sistemas, SIA](https://appshunter.io/developer/498486257) | [宇森 吴](https://appshunter.io/developer/1837612323) |

## What reviewers say

### i Open EDOC

[App page](https://appshunter.io/ios/app/i-open-edoc/id498486254)

This utility app allows iPhone and iPad users to open and view electronically signed documents in the EDOC format received via email. It automatically recognizes *.edoc email attachments and displays the contents of each signed document, along with the signer's name and signing time.

**Highlights:** Open EDOC email attachments, View signed document contents, Display signer's name, Show signing time, Automatic file recognition

**Features:** macOS Compatibility

**In-app purchases:** none


### KooSync

[App page](https://appshunter.io/ios/app/koosync/id6752115401)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is i Open EDOC free?

i Open EDOC is free to download, with no in-app purchases.

### Is KooSync free?

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

### Do i Open EDOC or KooSync have ads?

Neither i Open EDOC nor KooSync shows ads.

### Which is updated more often, i Open EDOC or KooSync?

i Open EDOC ships an update every 10 months, and KooSync every 3 weeks. Most recently, i Open EDOC was updated on October 9, 2026 and KooSync on October 30, 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.*