Comparison

Strongbox Pro vs Möbius Sync Pro

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

Head to head
About

Strongbox Pro

Securely store and protect all your passwords with one master password. Supports open-source formats and offers advanced security features like biometric unlock, hardware token protection, and cloud syncing.

Highlights
  • Master password protection
  • Biometric unlock (Face ID/Touch ID)
  • Passkey and YubiKey support
  • Military-grade encryption
  • Cloud sync (iCloud, Dropbox, etc.)
  • Password auditing (weak passwords, HIBP check)
  • Secure password generation
Features
Read full description

Strongbox Pro is available here for outright and upfront purchase instead of via an In-App Purchase upgrade. This version of Strongbox is identical to the much loved Strongbox application with all the Pro features and the same regular update schedule. Strongbox is an application for keeping all your passwords safely stored and protected by one master password. Supporting the open source Password Safe and KeePass formats. *** Supports Family Sharing *** *** Features *** - Face ID/Touch ID Unlock for the ultimate in convenience, security and speed. - PIN Code Unlock with a Duress PIN option for those tricky situations. - Passkey support - The latest, most convenient and most secure authentication method (passkeys). - YubiKey protection - secure your databases with a hardware token. - Secure - protected by time tested military grade cryptography. - Private - Isolated In-App attachments viewer for your sensitive documents, photos & videos. - Audit your passwords - Automatically check your database for weak passwords including a 'Have I Been Pwned?' check. - Cloud Support, so you can access your cloud safes using iCloud, Dropbox, OneDrive, Google Drive, WebDAV or SFTP even when offline. Use the built in Files app for many other storage options or store them securely only on your local device. You choose your storage. - Search your entire set of passwords and secrets instantly and powerfully, with deep search. Autocomplete new entries, and auto generate secure passwords. - Compatible - Import/Export by Files app, Email, CSV, iTunes File Sharing or use cloud storage. - Standards compliant - using the time tested Password Safe and KeePass formats so you can import any existing password safe you have. - Features galore - Incredibly configurable password generation including Diceware (XKCD) & regular passwords. - Timed Auto Clear Clipboard. - Entry History. - KeePass Field References, Tags, Custom Icon & FavIcons (including automatic search & download). - Two Factor Authentication codes (TOTP) - QR Code, Steam & Manual. --------------------------------------------------------------------- • Payment will be charged to iTunes Account at confirmation of purchase • Strongbox Privacy Policy may be found here: https://strongboxsafe.com/privacy-policy/ • Strongbox Terms of Use may be found here: https://strongboxsafe.com/terms/

About

Möbius Sync Pro

Synchronize files between your iOS devices and other Syncthing-compatible platforms without relying on cloud storage. Supports multiple folders and remote devices, with options to use the app's sandbox or access other app sandboxes.

Highlights
  • File synchronization without cloud services
  • Supports multiple folders
  • Supports multiple remote devices
  • Integrates with iOS Files app
  • Uses open-source Syncthing engine
Features
Read full description

Möbius Sync brings Syncthing to your iPhone or iPad, allowing you to synchronize selected files between iOS devices and other devices supported by Syncthing, without the need for any cloud service. Supports multiple folders and multiple remote devices. Synchronized folders can be created either: 1. in the Möbius Sync sandbox and files can be added to and retrieved from shared folders via the iOS Files app; or 2. by accessing other apps' sandboxes. This feature is EXPERIMENTAL and may break other app's functionality. Uses the open-source Syncthing engine internally. NOTE: The functionality in this Möbius Sync Pro app variant is identical to that which can unlocked by in-app purchase is in Möbius Sync (Freemium) - that has limited functaionality available for free for users who wish to try before purchase.

Screenshots

Strongbox Pro4 screens
Möbius Sync Pro1 screens

Verdict

The call

The clearest difference is price: Möbius Sync Pro at $4.99 against Strongbox Pro's $99.99. Möbius Sync Pro also leads on in-app purchases (none vs 7). Strongbox Pro's advantage is rating (4.7 vs 4.0) and update cadence (every 2 weeks vs every 3 months). On ads, monetization model 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

Strongbox Pro costs $99.99 and Möbius Sync Pro $4.99 up front. Strongbox Pro sells 7 in-app purchases, starting at $2.99 per month. Möbius Sync Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Strongbox Pro holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Strongbox Pro has 338 ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 86% of Strongbox Pro's written reviews are positive against 64% of Möbius Sync Pro's.

UpkeepUpdate frequency

Strongbox Pro ships an update every 2 weeks, Möbius Sync Pro every 3 months. Both last shipped on September 23, 2026.

Scorecard8 real differences · 3 level
Strongbox Pro versus Möbius Sync Pro: the parameters behind the verdict, then further details
ParameterStrongbox ProMöbius Sync Pro
Price$99.99$4.99 — better
Rating4.7 (338 ratings) — better4.0 (27 ratings)
Positive reviews85.7% of reviews — better64.0% of reviews
Number of ratings338 — better27
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
Best chart rank#135 — better—
DevicesiPhone, iPad, iPod, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.014.1 — better
Further details — not scored
Size136 MB22 MB
Age rating4+4+
DeveloperPhoebe Code LimitedPickup Infinity Limited

Customer experience

Strongbox Pro

All ratings338 ratings
Positive93.5%
Neutral0.9%
Negative5.6%
Written reviews223 reviews
Positive85.7%
Neutral3.6%
Negative10.8%

Möbius Sync Pro

All ratings27 ratings
Positive70.4%
Neutral11.1%
Negative18.5%
Written reviews25 reviews
Positive64.0%
Neutral8.0%
Negative28.0%

In-app purchases

7 purchases

Strongbox Pro

Subscriptions2
  • Monthly Tip$2.991 Month
  • Annual Tip$19.991 Year
One-time5
  • Little Tip$4.99
  • Small Tip$9.99
  • Medium Tip$19.99
Show 2 more
  • Large Tip$99.99
  • Huge Tip$199.99
None

Möbius Sync Pro

No in-app purchases

Questions

Is Strongbox Pro free?
Strongbox Pro costs $99.99, and also offers in-app purchases.
Is Möbius Sync Pro free?
Möbius Sync Pro costs $4.99, with no in-app purchases.
Which has better reviews, Strongbox Pro or Möbius Sync Pro?
Strongbox Pro is rated higher. Strongbox Pro averages 4.7 out of 5 from 338 ratings, while Möbius Sync Pro averages 4.0 from 27 ratings.
Do Strongbox Pro or Möbius Sync Pro have ads?
Neither Strongbox Pro nor Möbius Sync Pro shows ads.
Which is updated more often, Strongbox Pro or Möbius Sync Pro?
Strongbox Pro ships an update every 2 weeks, and Möbius Sync Pro every 3 months. Most recently, Strongbox Pro was updated on September 23, 2026 and Möbius Sync Pro on September 23, 2026.

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