Comparison

Resilio Sync vs OLM Viewer

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

Head to head
About

Resilio Sync

Securely transfer files and back up photos between your devices without using third-party servers. Enjoy unlimited storage and speed, with direct peer-to-peer transfers for privacy and efficiency. Supports all file types across various platforms.

Highlights
  • Private cloud creation
  • Secure direct file transfers
  • Unlimited storage and speed
  • Automatic camera backup
  • Cross-platform device support
  • Selective file syncing
Read full description

Sync is the best way to transfer files between your Mac, PC, NAS, and even server. Create your own private cloud. Connect devices and sync files securely without sending them on third-party servers. We don’t limit your speed or storage space: our technology works especially well with huge files. No storage limits • Sync as much data as you have on your hard drives. Automatic camera backup • Sync will back up photos and videos as soon as you take them. • You can then delete photos from your phone and save space. Direct transfers, no cloud • Your information is never stored on servers in the cloud, so nobody can access it without your permission. • Transfer files directly and fast using peer-to-peer technology (p2p). Any device and platform • Access folders and upload files to your tablet, PC, Mac, NAS, and even server. Supports all file types • Add photos, videos, music, docs, and PDFs from other apps to any of your synced folders. Save space • Selective Sync lets you save only the files you need. To get the best performance and to avoid running up your data charges while syncing folders, we recommend leaving the "Use Cellular Data" setting off. By downloading or using this app, you agree to the Terms of Use: (https://www.resilio.com/legal/terms-of-use), Privacy Policy (https://www.resilio.com/legal/privacy) and End User License Agreement (https://www.resilio.com/legal/eula-sync).

About

OLM Viewer

Features
Read full description

OLM Viewer & Converter is a powerful, privacy-first utility designed to help you easily open OLM files, read OLM email archives, and export mailbox data natively on your device. WHETHER YOU NEED AN OLM READER OR CONVERTER: If you have a Mac Outlook file (file OLM) and need an efficient OLM viewer or OLM reader, this app provides an intuitive solution to inspect and process your data. You can open OLM files instantly without needing third-party software or uploading sensitive mailboxes to external cloud servers. KEY FEATURES: • Seamless OLM File Viewing: Open OLM archives, browse nested mail folders, read OLM email messages, view calendar entries, and check contacts. • Convert OLM File to CSV: Export structured mailbox records to spreadsheets. Use our OLM to CSV converter capabilities to convert OLM to CSV on Mac or iOS, or convert OLM file to Excel on Mac for easy data analysis. • Convert OLM to MBOX: Need an OLM to MBOX converter? Export your email folders into universal MBOX formats (convert OLM to MBOX Mac) for seamless mail client migration. • Convert OLM to PDF & EML: Easily convert OLM to PDF for printing and document archiving, or export messages as standard EML files. • Export Contacts & Calendars: Convert OLM to ICS for calendar events and vCard for address book contacts. MAILBOX MIGRATION & EXPORT OPTIONS: If you are searching for an OLM to PST converter or need to convert OLM file to PST format, our tool provides the ideal intermediate formats. While direct OLM to PST conversion is restricted on mobile, exporting your file OLM to MBOX or CSV enables smooth workflows to import OLM to Mac Mail, import OLM to Gmail, import OLM to Google Calendar, or import OLM to Office 365. Users looking to import OLM file data into enterprise platforms can use our generated standard files to import OLM to Office 365 Mac or import OLM into Office 365 accounts smoothly. Whether you need a Mac OLM converter, an OLM converter for Mac desktop/mobile environments, or a trusted OLM to CSV converter for Mac, this tool handles your archive export requirements effortlessly. PRIVACY & SECURITY FIRST: • 100% On-Device Processing: Every OLM file is parsed locally. Your emails, attachments, and personal records never leave your physical device. • Tracking Prevention: External tracking pixels and remote images are blocked by default to protect your privacy. Download OLM Viewer & Converter today to open, read, and export OLM file archives with total peace of mind!

Screenshots

Resilio Sync4 screens
OLM Viewer3 screens

Verdict

The call

The clearest difference is in-app purchases: Resilio Sync at none against OLM Viewer's 2. Resilio Sync also leads on iOS requirement (11 vs 15.0). OLM Viewer's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price and device support 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. OLM Viewer sells 2 in-app purchases, starting at $7.99 per 7 days. Resilio Sync asks for nothing beyond the download.

UpkeepUpdate frequency

Resilio Sync ships an update every 3 months, OLM Viewer every 3 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Resilio Sync versus OLM Viewer: the parameters behind the verdict, then further details
ParameterResilio SyncOLM Viewer
PriceFreeFree
Rating4.5 (861 ratings) — better—
Positive reviews77.0% of reviews—
Number of ratings861 — better—
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11 — better15.0
Further details — not scored
Size31 MB29 MB
Age rating4+4+
DeveloperResilio Inc.OMER FARUK KIZILTUG

Bugs and requests

Resilio Sync

Reported bugs

3 issues
  • Syncing issues after iOS updates
  • Inconsistent behavior when removing folders
  • Camera roll backup not working as expected

Requested features

4 requests
  • Improved iOS integration with Files app
  • Background sync for camera roll backup
  • Built-in media player and gallery view
  • Ability to select and move multiple files at once

OLM Viewer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Resilio Sync

No in-app purchases

2 purchases

OLM Viewer

Subscriptions2
  • Weekly Premium3 Days trial$7.997 Days
  • Yearly Premium$49.991 Year

Questions

Is Resilio Sync free?
Resilio Sync is free to download, with no in-app purchases.
Is OLM Viewer free?
OLM Viewer is free to download, with in-app purchases available.
Do Resilio Sync or OLM Viewer have ads?
Resilio Sync shows ads; OLM Viewer does not.
Which is updated more often, Resilio Sync or OLM Viewer?
Resilio Sync ships an update every 3 months, and OLM Viewer every 3 weeks. Most recently, Resilio Sync was updated on November 1, 2026 and OLM Viewer on October 31, 2026.

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