Comparison

Möbius Sync vs Cryptomator

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

Head to head
About

Möbius Sync

Synchronize files between your iOS devices and other Syncthing-supported platforms without relying on cloud storage. Manage multiple folders and remote devices, with options for sandbox or experimental cross-app sandbox syncing.

Highlights
  • File synchronization between iOS and other Syncthing devices
  • No cloud service required
  • Supports multiple folders and remote devices
  • Sync within app sandbox or other app sandboxes (paid)
  • 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. (PAID feature) by accessing other apps' sandboxes. This feature is EXPERIMENTAL and may break other app's functionality. Uses the open-source Syncthing engine internally. Usage within the Möbius Sync sandbox is free up to 20MB. Unlimited file sync, including files in other apps' sanboxes is available for a one-time purchase. NOTE: The functionality unlocked by in-app purchase is identical to that in Möbius Sync Pro (which is purchased up-front).

About

Cryptomator

Encrypt your sensitive data stored in cloud services with this open-source tool. It allows you to create secure vaults with passwords, accessible only by you, and integrates seamlessly with your device's file system. Protect your privacy and ensure your data remains confidential.

Highlights
  • Cloud data encryption
  • Password-protected vaults
  • Face ID/Touch ID unlock
  • Files app integration
  • Compatible with major cloud services
  • Open-source software
Features
Read full description

With Cryptomator, the key to your data is in your hands. Cryptomator secures and encrypts your sensitive data in your favorite cloud service. So you can rest assured that only you can access your data. EASY-TO-USE Cryptomator is a simple tool for digital self-defense. It allows you to protect your cloud data by yourself and independently. • Simply create a vault and assign a password • No additional account or configuration needed • Unlock vaults with Face ID / Touch ID • Fully integrated into the Files app COMPATIBLE Cryptomator is compatible with the most commonly used cloud storages and available for all major operating systems. • Compatible with iCloud Drive, Dropbox, Google Drive, OneDrive, SharePoint (incl. Microsoft Teams), pCloud, Box, WebDAV- and S3-based cloud storage services • Create vaults in any location via other File Providers (third-party apps must support this) • Access your vaults on all your mobile devices and computers SECURE You don't have to trust Cryptomator blindly, because it is open source software. For you as a user, this means that everyone can see the code: https://github.com/cryptomator/ios • File content and filename encryption with AES and 256 bit key length • Vault password is secured with scrypt for enhanced brute-force resistance • Crypto implementation is publicly documented AWARD-WINNING Cryptomator received the CeBIT Innovation Award 2016 for Usable Security and Privacy. We're proud to provide security and privacy for hundreds of thousands of Cryptomator users. CRYPTOMATOR COMMUNITY Join the Cryptomator Community and participate in the conversations with other Cryptomator users: https://community.cryptomator.org • Follow us on Mastodon @cryptomator@mastodon.online • Like us on Facebook /Cryptomator --- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Möbius Sync1 screens
Cryptomator4 screens

Verdict

The call

The clearest difference is rating: Cryptomator at 4.4 against Möbius Sync's 3.8. Cryptomator also leads on update cadence (every 3 weeks vs every 2 months) and review sentiment (63% vs 55%). Möbius Sync's advantage is iOS requirement (14.1 vs 16.0). On price, ratings volume, ads and in-app purchases 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. Möbius Sync sells 1 one-off in-app purchase and Cryptomator sells 5 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Cryptomator holds the better App Store score, 4.4 against 3.8. Both are backed by a comparable volume of ratings — 140 and 410 respectively. Written reviews point the same way: 55% of Möbius Sync's written reviews are positive against 63% of Cryptomator's.

UpkeepUpdate frequency

Möbius Sync ships an update every 2 months, Cryptomator every 3 weeks. The most recent releases landed on September 25, 2026 and September 27, 2026 respectively.

Scorecard4 real differences · 6 level
Möbius Sync versus Cryptomator: the parameters behind the verdict, then further details
ParameterMöbius SyncCryptomator
PriceFreeFree
Rating3.8 (140 ratings)4.4 (410 ratings) — better
Positive reviews55.0% of reviews63.0% of reviews — better
Number of ratings140410 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.1 — better16.0
Further details — not scored
Size23 MB95 MB
Age rating4+4+
DeveloperPickup Infinity LimitedSkymatic GmbH

Customer experience

Möbius Sync

All ratings140 ratings
Positive67.9%
Neutral8.6%
Negative23.6%
Written reviews171 reviews
Positive55.0%
Neutral14.0%
Negative31.0%

Cryptomator

All ratings410 ratings
Positive83.2%
Neutral3.2%
Negative13.7%
Written reviews284 reviews
Positive63.0%
Neutral9.5%
Negative27.5%

User reviews

Möbius Sync

From 140 App Store ratings

What we love

  • ✅ Effective Syncthing implementation for iOS
  • 💰 Fair one-time purchase model (no subscription)
  • 🔒 Privacy-focused peer-to-peer syncing
  • 📱 Good Files app integration
  • ⚡ Fast file synchronization when working

Room to improve

  • 🐛 Outdated internal Syncthing version (1.28 vs 2.x)
  • 💸 Aggressive paywall at 20MB free limit
  • 🔌 No true background sync (iOS limitation)
  • 🚫 Cannot sync iOS Photos app natively
  • ⚠️ Inconsistent purchase restoration across devices

Cryptomator

From 410 App Store ratings

What we love

  • 🚀 Seamless integration with Files app
  • 🔒 Robust encryption and security
  • 👍 Easy to use and navigate
  • 🚀 Convenient cloud storage access
  • 💡 Useful for privacy-conscious users

Room to improve

  • 🐛 Occasional sync and upload issues
  • 🐛 Compatibility problems with some cloud services
  • 🐛 Unreliable file access and management
  • 🔋 High battery consumption reported

Bugs and requests

Möbius Sync

Reported bugs

16 issues
  • Syncthing version incompatibility with v2.x devices
  • Device discovery limited to 1 of 5 paired devices
  • Insufficient space errors despite available storage
  • Purchase dialog rendering issues on older devices
  • Purchase not persisting after app reinstall
Show 11 more
  • Settings reset after app updates
  • External folder bookmark path cannot be changed
  • .stfolder sync failures and naming conflicts
  • Sync hangs at intermediate percentages
  • Files not appearing in designated folders despite sync confirmation
  • App crashes and becomes unresponsive
  • Language preference not saved between sessions
  • Syncthing disabled errors with no explanation
  • Quick Sync feature not working reliably
  • Accessibility issues with VoiceOver
  • App storage consuming excessive disk space (10GB+)

Requested features

15 requests
  • Update internal Syncthing to version 2.x or higher
  • iOS Photos app sync capability (at least one-way upload)
  • True background synchronization
  • Selective folder sync to save storage space
  • File Provider extension for deeper iOS integration
Show 10 more
  • Widget for continuous background operation
  • Photo library backup functionality
  • Family sharing support for purchases
  • Better UI/UX with custom frontend instead of web interface
  • Automatic sync without manual app opening
  • Support for untrusted devices
  • Folder encryption support
  • Location-based sync triggers
  • More frequent Syncthing core updates
  • Better documentation and setup guides

Cryptomator

Reported bugs

4 issues
  • Vault password change issues
  • Files disappearing or becoming inaccessible
  • Freezing and crashes on certain devices
  • Compatibility problems with latest iOS versions

Requested features

4 requests
  • Automatic vault locking option
  • Improved search and file management functionality
  • Support for more cloud storage providers
  • Offline file access and editing

In-app purchases

1 purchases

Möbius Sync

One-time1
  • Unlimited file sync$4.99
5 purchases

Cryptomator

Subscriptions1
  • Full Version$9.991 Year
One-time4
  • 30-Day TrialFree
  • Free UpgradeFree
  • Paid Upgrade$2.99
Show 1 more
  • Full Version$29.99

Questions

Is Möbius Sync free?
Möbius Sync is free to download, with in-app purchases available.
Is Cryptomator free?
Cryptomator is free to download, with in-app purchases available.
Which has better reviews, Möbius Sync or Cryptomator?
Cryptomator is rated higher. Möbius Sync averages 3.8 out of 5 from 140 ratings, while Cryptomator averages 4.4 from 410 ratings.
Do Möbius Sync or Cryptomator have ads?
Neither Möbius Sync nor Cryptomator shows ads.
Which is updated more often, Möbius Sync or Cryptomator?
Möbius Sync ships an update every 2 months, and Cryptomator every 3 weeks. Most recently, Möbius Sync was updated on September 25, 2026 and Cryptomator on September 27, 2026.

Other comparisons