Comparison

Carbonio Mail vs OpenDocument Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Carbonio Mail

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
Read full description

Free app for all Carbonio and Carbonio Community Edition users. Also compatible with Zextras Suite, starting from 3.8.0 version. Seamlessly move from your desktop to the app and access all your e-mails, calendars, and contacts from your smartphone and tablet. Main features: - Modern and comfortable interface - Dark Mode - Complete e-mail and folders management - Shared folders support and Management (Available only with Carbonio) - Search for emails or contacts in the unified search tab - Perform quick actions from email preview - Delayed and programmed send (Available only with Carbonio) - Rich text editor - Set priorities to emails - Attach files - Tag e-mails - Signatures Management - Manage settings - Manage contacts - Full management of calendars and appointments - Out-Of-Office support (Available only with Carbonio) - Multi-accounts management (Available only with Carbonio) - Multi identity management (Available only with Carbonio)

About

OpenDocument Reader

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
Read full description

Read documents created using LibreOffice or OpenOffice on the go, wherever you keep them, with the Document Reader! The file reader lets you open files like ODF (Open Document Format) documents created using LibreOffice or OpenOffice wherever you are. In the bus on your way to school wanting to look at your notes before the big exam? No problem! With the Document Reader you can open files wherever you like and read & search through your documents to go in a clean and simple way. There is a text editor in here as well, for the last typo before a document goes out. It is a young one and it does not reach every document yet, so the reader is what this app is for. New paragraphs, text and cell formatting and more ways to mark PDFs come with OpenDocument Reader Pro. You can open files from ODF (ODT, ODS & many more) that you have created with Libre Office or OpenOffice also from within other apps. Supported apps include GMail, Google Drive, iCloud, OneDrive, Nextcloud, Box.net, Dropbox and lots of others! Or use our integrated file explorer instead to open files on your device. THE ALL IN ONE DOCUMENT READER *open files with ODF: ODT (writer), ODS (calc), ODP and ODG without a hassle *fix typos, edit and colour spreadsheet cells, and highlight text in documents and PDFs *securely open password-protected documents *search for keywords in your ODT (writer), ODS (calc) or ODG and highlight them *print documents if your device is connected to a printer *read your documents in fullscreen to avoid distractions *select and copy text out of your documents *enjoy your documents even without internet connectivity - fully offline capable *read out aloud your documents using Text-To-Speech technology DOCUMENTS TO GO - WHEREVER YOU LIKE In addition to that, the document reader aims to support various other file formats as well as possible: - Portable Document Format (PDF) - Archives: ZIP - Images: JPG, JPEG, GIF, PNG, WEBP, TIFF, BMP, SVG, etc - Videos: MP4, WEBM, etc - Audio: MP3, OGG, etc - Text files: CSV, TXT, HTML, MD, RTF - Microsoft Office (OOXML): Word (DOC, DOCX), Excel (XLS, XLSX), PowerPoint (PPT, PPTX) - Apple iWork: Pages, Numbers, Keynote - Libre Office and Open Office ODF (ODT, ODS, ODP, ODG, FODT, FODS, FODP, FODG) This app is open source. We are not affiliated with OpenOffice, LibreOffice or similar. Made in Austria. Ads are shown in order to support the development of this app. They are free to remove temporarily via the in-app menu. We highly appreciate all kinds of feedback via email. ODF is the format used by office suites like Open Office and Libre Office. Text documents (Writer, ODT), as well as spreadsheets (Calc, ODS) and also presentations (Impress, ODP) are supported, including complex formatting and embedded images. Graphs are no problem either. If you want to secure your data you can even open password-protected documents. Other applications that are using this format are LibreOffice, OpenOffice, NeoOffice, StarOffice, Go-oo, IBM Workplace, IBM Lotus Symphony, ChinaOffice, AndrOpen Office, Co-Create Office, EuroOffice, KaiOffice, Jambo OpenOffice, MagyarOffice, MultiMedia Office, MYOffice, NextOffice, OfficeOne, OfficeTLE, OOo4Kids, OpenOfficePL, OpenOfficeT7, OxOffice, OxygenOffice, Pladao Office, PlusOffice, RedOffice, RomanianOffice, SunShine Office, ThizOffice, UP Office, White Label Office, WPS Office Storm, Libre Office, Collabora Office and 602Office.

Screenshots

Carbonio Mail4 screens
OpenDocument Reader4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
Carbonio Mail versus OpenDocument Reader: the parameters behind the verdict, then further details
ParameterCarbonio MailOpenDocument Reader
PriceFreeFree
Rating1.0 (1 ratings)4.5 (910 ratings) — better
Positive reviews17.0% of reviews30.1% of reviews — better
Number of ratings1910 — better
Update frequencyMonthlyFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size71 MB12 MB
Age rating4+4+
DeveloperZextrasStefl und Taschauer OG

Customer experience

Carbonio Mail

Written reviews47 reviews
Positive17.0%
Neutral19.1%
Negative63.8%

OpenDocument Reader

All ratings909 ratings
Positive86.9%
Neutral5.4%
Negative7.7%
Written reviews83 reviews
Positive30.1%
Neutral7.2%
Negative62.7%

Bugs and requests

Carbonio Mail

Not enough reviews yet to summarise bugs or requests.

OpenDocument Reader

Reported bugs

3 issues
  • Corrupted files
  • Formatting issues
  • Crashes and app closing issues

Requested features

3 requests
  • Dark mode option
  • Better spreadsheet editing capabilities
  • Improved file format compatibility

In-app purchases

None

Carbonio Mail

No in-app purchases

None

OpenDocument Reader

No in-app purchases

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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