# Carbonio Mail vs OpenDocument Reader

The clearest difference is rating: OpenDocument Reader at 4.5 against Carbonio Mail's 1.0. OpenDocument Reader also leads on ratings volume (910 vs 1) and review sentiment (30% vs 17%). Carbonio Mail's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

OpenDocument Reader holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: OpenDocument Reader has 910 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 17% of Carbonio Mail's written reviews are positive against 30% of OpenDocument Reader's.

Carbonio Mail ships an update monthly, OpenDocument Reader fortnightly. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Carbonio Mail | OpenDocument Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/carbonio-mail/id1490253524/reviews) | **[4.5 (910 ratings)](https://appshunter.io/ios/app/opendocument-reader-view-odt/id1510195065/reviews)** |
| Number of ratings | 1 | **910** |
| Positive reviews | 17.0% of reviews | **30.1% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free** | Ad-supported |
| Size | 71 MB | 12 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zextras](https://appshunter.io/developer/1435606921) | [Stefl und Taschauer OG](https://appshunter.io/developer/1452061742) |

## What reviewers say

### Carbonio Mail

[App page](https://appshunter.io/ios/app/carbonio-mail/id1490253524)

Access your emails, calendars, and contacts seamlessly from your smartphone or tablet. Enjoy a modern interface with features like dark mode, unified search, and rich text editing for efficient communication.

**Highlights:** Modern interface with Dark Mode, Email and folder management, Unified search for emails and contacts, Calendar and appointment management, Rich text editor, Multi-account management

**Features:** macOS Compatibility

**In-app purchases:** none


### OpenDocument Reader

[App page](https://appshunter.io/ios/app/opendocument-reader-view-odt/id1510195065)

View and edit ODT, ODS, and ODP files on your mobile device. Seamlessly open documents from cloud storage or your device's file explorer, with support for password-protected files and keyword searching. Enjoy offline access and basic editing capabilities.

**Highlights:** View ODT, ODS, ODP files, Basic document editing, Open from cloud storage, Password-protected document support, Keyword search and highlighting, Offline functionality, Print documents

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast file opening
- 💡 Good ODT reader

**What reviewers complain about**

- 🐛 Corrupted files upon editing
- 🐛 Presentation issues with formatting and features
- 🐛 Inability to edit spreadsheets properly

**Reported bugs**

- Corrupted files
- Formatting issues
- Crashes and app closing issues

**Requested features**

- Dark mode option
- Better spreadsheet editing capabilities
- Improved file format compatibility


## Frequently asked questions

### Is Carbonio Mail free?

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

### Is OpenDocument Reader free?

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

### Which has better reviews, Carbonio Mail or OpenDocument Reader?

OpenDocument Reader is rated higher. Carbonio Mail averages 1.0 out of 5 from 1 ratings, while OpenDocument Reader averages 4.5 from 910 ratings.

### Do Carbonio Mail or OpenDocument Reader have ads?

OpenDocument Reader shows ads; Carbonio Mail does not.

### Which is updated more often, Carbonio Mail or OpenDocument Reader?

Carbonio Mail ships an update monthly, and OpenDocument Reader fortnightly. Most recently, Carbonio Mail was updated on October 28, 2026 and OpenDocument Reader on October 29, 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.*