Comparison

OOReader vs Event Sync

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

Head to head
About

OOReader

View office documents from various suites, including OpenOffice, LibreOffice, and Microsoft Office formats, as well as PDFs. Convert documents to PDF for easy sharing and printing, with an internet connection required for conversion.

Highlights
  • View ODF, DOCX, XLSX, PPTX, PDF
  • Convert documents to PDF
  • Share and print documents
  • Page-by-page viewing
  • Search within documents
  • Password protected document viewing (PRO)
Features
Read full description

OOReader is the essential mobile viewer for all your office documents. Easily open and view files created with OpenOffice and LibreOffice (Writer, Calc, Impress), common Microsoft Office formats (Word, PowerPoint, Excel), PDFs, and many other documents. Instantly access all your critical information, regardless of the file type: OpenOffice / LibreOffice (ODF Standard): • Writer: ODT, OTT, STW, SXW • Calc: ODS, OTS, STC, SXC • Impress: ODP, OTP, SDD, SDP • Draw & Math: ODG, OTG, STD, SXD, ODF, ODC, SXM, MML Microsoft Office: • Word: DOC, DOT, DOCX, DOTX, DOCM • Excel: XLS, XLT, XLSX, XLTX, XLSM • PowerPoint: PPS, PPT, POT, PPSX, PPTX, POTX • Visio: VDX, VSD, VSDX Other Formats: • PDF (Adobe Portable Document Format) • RTF (Rich Text Format, WordPad) • Legacy: WordPerfect, Lotus 1-2-3, QuattroPro, WordPro, QuarkXPress Key Features: • Quick PDF Conversion: Easily convert any supported document into a standard PDF file for reliable sharing or archival. • Sharing & Printing: Instantly share the converted PDF via email or to other apps, or print the document directly. • Optimal Viewing: Seamless page-by-page or slide-by-slide reading modes. • Essential Tools: Use the built-in search function to find specific text within long documents. • Advanced Features (PRO Upgrade): ◦ Open documents with password protection. ◦ View documents with unlimited pages (removes the 100-page limit). Important Notes: • OOReader is a document viewer only. File content cannot be edited or modified. • To perform document conversion for accurate viewing, OOReader utilizes an online service. An Internet connection is required for this conversion process.

About

Event Sync

Features
Read full description

Event Sync simplifie l'organisation de vos événements en famille et entre amis. Créez un événement en quelques secondes, invitez vos proches avec un simple code ou un lien, et gérez tout au même endroit : qui vient, qui apporte quoi, et les petits rappels pour ne rien oublier. FONCTIONNALITÉS • Créez un événement (anniversaire, repas de famille, sortie...) en quelques clics • Invitez vos proches par code ou lien de partage • Suivez les réponses (présent, absent, en attente) en un coup d'œil • Répartissez les tâches et ce que chacun apporte, pour éviter les doublons • Recevez des rappels avant le jour J • Retrouvez tous vos événements à venir dans votre agenda partagé Fini les groupes de discussion illisibles et les tableurs partagés : Event Sync centralise l'organisation pour que chacun sache quoi faire, sans y penser. Simple, rapide, et pensé pour la famille. Conditions d'utilisation (CLUF) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Conditions générales d'Event Sync : https://event-sync.app/support/tos Politique de confidentialité : https://event-sync.app/support/privacy

Screenshots

OOReader4 screens
Event Sync4 screens

Verdict

The call

The clearest difference is in-app purchases: Event Sync at none against OOReader's 1. Event Sync also leads on ads (none vs shown) and update cadence (weekly vs every 2 months). On price, 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. OOReader sells 1 one-off in-app purchase. Event Sync asks for nothing beyond the download.

UpkeepUpdate frequency

OOReader ships an update every 2 months, Event Sync weekly. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

Scorecard3 real differences · 5 level
OOReader versus Event Sync: the parameters behind the verdict, then further details
ParameterOOReaderEvent Sync
PriceFreeFree
Positive reviews53.0% of reviews—
Update frequencyEvery 2 monthsWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.615.1 — better
Further details — not scored
Size37 MB51 MB
Age rating4+4+
DeveloperBML Solutions Inc.Samy QAIS

Bugs and requests

OOReader

Reported bugs

4 issues
  • Crashes when opening files
  • Inconsistent file handling (caching issues)
  • Inability to open larger documents
  • Compatibility issues with newer iOS versions

Requested features

6 requests
  • Add search and delete functions
  • Improve handling of password-protected files
  • Increase file size/page limit
  • Add editing capabilities
  • Improve font/formatting preservation
Show 1 more
  • Provide more cloud storage integration options

Event Sync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

OOReader

One-time1
  • OOReader Pro$3.99
None

Event Sync

No in-app purchases

Questions

Is OOReader free?
OOReader is free to download, with in-app purchases available.
Is Event Sync free?
Event Sync is free to download, with no in-app purchases.
Do OOReader or Event Sync have ads?
OOReader shows ads; Event Sync does not.
Which is updated more often, OOReader or Event Sync?
OOReader ships an update every 2 months, and Event Sync weekly. Most recently, OOReader was updated on October 23, 2026 and Event Sync on October 21, 2026.

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