Comparison

Retain Archive vs OLM Converter · Viewer, Reader

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

Head to head
About

Retain Archive

Access and manage archived business communications, including emails, social media, and mobile messages. Browse, search, and preview attachments from various platforms for case assessment and eDiscovery.

Highlights
  • Unified archiving of business communications
  • Access archived email, social media, and mobile data
  • Browse and search archived messages
  • Preview message attachments
  • View social media archives (WhatsApp, WeChat, LinkedIn, etc.)
Features
Read full description

Micro Focus Retain Unified Archiving provides unified archiving of all business communication including email, social media, and mobile communication data for case assessment, search, and eDiscovery. The Retain App provides users and administrators direct access to view, browse, search, and these business communications. • Access all the archived accounts you manage • Browse messages in the archived accounts • Preview message attachments • View archive social media messages from WhatsApp, WeChat, LinkedIn, Twitter, Facebook, SharePoint, and Instagram For more information about Retain Unified Archiving, see https://www.microfocus.com/products/retain-unified-archiving/.

About

OLM Converter · Viewer, Reader

Easily open, read, and convert Outlook for Mac archive files (.olm) on your devices. Browse mail, contacts, and calendar entries, then export them to various formats like MBOX, PDF, and CSV without needing Outlook.

Highlights
  • Open .olm archives without Outlook
  • Read mail, contacts, calendar, notes, tasks
  • Browse full folder tree and search mail
  • Convert to MBOX, EML, PDF, CSV, HTML, vCard, ICS
  • Export entire mailboxes or selected folders
  • Process large archives on-device
Features
Read full description

Have an OLM file you cannot open? OLM Converter opens Outlook for Mac archives right on your Mac, iPhone, and iPad, lets you read everything inside, and converts it to the formats you actually use. Open a .olm export, browse every folder, and read your mail, contacts, calendar, notes, and tasks. Then convert and export the parts you need, all on your device. WHAT YOU CAN DO • Open and read .olm archives from Outlook for Mac, no Outlook needed • Browse the full folder tree, and search mail by subject, sender, or text • View contacts, calendar events, notes, and tasks • See every attachment and save it to Files • Convert and export to MBOX, EML, CSV, PDF, HTML, vCard, and ICS • Export a whole mailbox, or just the folder you choose EXPORT FORMATS • MBOX, or a zipped folder tree of MBOX files • EML, one message per file, with the folder structure preserved • PDF for reading and sharing • CSV of the message list • A browsable HTML archive • vCard (.vcf) contacts and ICS (.ics) calendar events BUILT RIGHT • Runs on Mac, iPhone, and iPad • Everything happens on your device. Your archive never leaves it • No account, no sign in, nothing is uploaded • Handles large, multi gigabyte archives • Fast, reliable, and faithful to the original PERFECT FOR • Opening an .olm file on your Mac without Outlook • Anyone moving away from Outlook for Mac • Moving your mail into another app that reads MBOX or EML, such as Apple Mail or Thunderbird • Archiving, exporting, or simply reading an old .olm file OLM Converter is an independent app and is not affiliated with, endorsed by, or sponsored by any email software vendor. OLM and Outlook are referenced only to indicate the file format the app works with. Privacy Policy: https://rush.tools/privacy Terms of Use: https://rush.tools/terms

Screenshots

Retain Archive4 screens
OLM Converter · Viewer, Reader4 screens

Verdict

The call

The clearest difference is review sentiment: Retain Archive at 100% against OLM Converter · Viewer, Reader's 0%. Retain Archive also leads on in-app purchases (none vs 9). OLM Converter · Viewer, Reader's advantage is update cadence (weekly vs every 3 months). On price, ads, 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. OLM Converter · Viewer, Reader sells 8 in-app purchases, starting at $4.99 per 7 days. Retain Archive asks for nothing beyond the download.

UpkeepUpdate frequency

Retain Archive ships an update every 3 months, OLM Converter · Viewer, Reader weekly. The most recent releases landed on October 29, 2026 and November 1, 2026 respectively.

Scorecard4 real differences · 6 level
Retain Archive versus OLM Converter · Viewer, Reader: the parameters behind the verdict, then further details
ParameterRetain ArchiveOLM Converter · Viewer, Reader
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS14.0 — better15.0
Further details — not scored
Size8 MB24 MB
Age rating4+4+
DeveloperOpenTextRush Tools LLC

Customer experience

Retain Archive

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

OLM Converter · Viewer, Reader

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Retain Archive

No in-app purchases

8 purchases

OLM Converter · Viewer, Reader

Subscriptions7
  • Pro Weekly3 Days trial$4.997 Days
  • Pro Weekly$9.997 Days
  • Pro Annual$19.991 Year
Show 4 more
  • Pro Annual$29.991 Year
  • Pro Annual2 variants$39.991 Year
  • Pro Annual$49.991 Year
  • Pro Annual$79.991 Year
One-time1
  • Pro Lifetime$59.99

Questions

Is Retain Archive free?
Retain Archive is free to download, with no in-app purchases.
Is OLM Converter · Viewer, Reader free?
OLM Converter · Viewer, Reader is free to download, with in-app purchases available.
Do Retain Archive or OLM Converter · Viewer, Reader have ads?
Neither Retain Archive nor OLM Converter · Viewer, Reader shows ads.
Which is updated more often, Retain Archive or OLM Converter · Viewer, Reader?
Retain Archive ships an update every 3 months, and OLM Converter · Viewer, Reader weekly. Most recently, Retain Archive was updated on October 29, 2026 and OLM Converter · Viewer, Reader on November 1, 2026.

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