Oracle Mobile Authenticator vs Msg Viewer Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Oracle Mobile Authenticator
Securely verify your identity with your mobile device. This app generates one-time passcodes for logins or sends push notifications for approval, adding a vital layer of security to online applications beyond standard username and password.
- Generate one-time passwords offline
- Push notification approval
- App protection with Touch ID or PIN
- Setup via QR code, URL, or manual key
- Support for multiple accounts
- Generate OTP for other RFC 6238 compliant apps
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Oracle Mobile Authenticator enables you to securely verify your identity by using your mobile device as an authentication factor. The app generates one-time passcode for login. Or it can receive notifications for login, which can be approved with a simple tap. When this authentication is used on top of username-password, it adds an additional layer of security that is essential for today's online applications. Features: • Generate one-time passwords even when the device is offline • Push Notification based approval • Touch ID or App PIN for app protection • Set up via QR code, Config URL, or by entering key manually • Multiple account support • Generate OTP for other applications that make use of Passcode as per RFC 6238 By installing this app you agree to the End User License Agreement terms at http://www.oracle.com/webfolder/technetwork/cloud/documents/eula.html. See Oracle's Privacy Policy at http://www.oracle.com/us/legal/privacy/index.html.
Msg Viewer Pro
Easily view and manage Microsoft Outlook .msg, .oft, and .eml files, along with winmail.dat and .mht formats. Access messages, notes, contacts, and attachments with a simple, fast interface. Share, print, or preview files directly from your device.
- Open MSG, OFT, EML, Winmail.dat, MHT files
- View messages, notes, contacts, attachments
- Preview and share attachments
- Add files via iTunes File Sharing
- Share or open documents with other apps
- Print documents
- Dark mode support
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Msg Viewer Pro: the best, easiest, fastest, and reliable way to view Microsoft Outlook *.msg, *.oft, winmail.dat(Microsoft TNEF), *.mht and *.eml files. No subscription, just one-time purchase for iPhone, iPad, and Mac. KEY FEATURES: ◆Easy to use, open msg, winmail, mht and eml files. ◆Quick look msg, winmail, mht and eml files. ◆Add files through iTunes File Sharing. ◆View messages, notes, contacts, and attachments. ◆Share or open document with other App. ◆Preview attachments, Share attachments. ◆Print document. ◆Dark mode supported. SUPPORT: Please feel free to contact us if you have any questions about using our products at any time. Email: support@firmshell.com
Screenshots
Verdict
The clearest difference is review sentiment: Msg Viewer Pro at 69% against Oracle Mobile Authenticator's 14%. Msg Viewer Pro also leads on rating (4.0 vs 2.6) and iOS requirement (12.0 vs 14.0). Oracle Mobile Authenticator's advantage is price (Free vs $4.99) and ratings volume (90 vs 4). On update cadence, ads, in-app purchases 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
Oracle Mobile Authenticator is free to download; Msg Viewer Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Msg Viewer Pro holds the better App Store score, 4.0 against 2.6. That said, the two scores are not equally well evidenced: Oracle Mobile Authenticator has 90 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 14% of Oracle Mobile Authenticator's written reviews are positive against 69% of Msg Viewer Pro's.
Oracle Mobile Authenticator ships an update every 3 months, Msg Viewer Pro every 2 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | Oracle Mobile Authenticator | Msg Viewer Pro |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 2.6 (90 ratings) | 4.0 (4 ratings) — better |
| Positive reviews | 14.1% of reviews | 69.0% of reviews — better |
| Number of ratings | 90 — better | 4 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Oracle America, Inc. | 群群 刘 |
Customer experience
Oracle Mobile Authenticator
Msg Viewer Pro
Bugs and requests
Oracle Mobile Authenticator
Not enough reviews yet to summarise bugs or requests.
Msg Viewer Pro
Reported bugs
11 issues- App crashes repeatedly when opening certain messages
- Crashes when closing emails within the app
- M1/M1 Pro/Max compatibility issues
- Memory management problems with large files
- Search crashes on large archives
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- Unexpected quit on macOS 15.5
- Attachment display mangled or corrupted
- Nested .eml attachments become corrupt
- Inconsistent file format support
- App closes unexpectedly even after normal shutdown
- Fails to open files from cloud services (Dropbox)
Requested features
9 requests- Dark mode and light mode options
- Drag and drop functionality
- More powerful search commands
- Integration with third-party search tools (HoudahSpot)
- Direct export from .oft to .emltpl format
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- Better inline image handling
- Modern toolbar icon design
- Settings to control image embedding behavior
- Support for additional document formats
In-app purchases
Oracle Mobile Authenticator
No in-app purchases
Msg Viewer Pro
No in-app purchases
