# Strongbox vs Möbius Sync

The clearest difference is rating: Strongbox at 4.7 against Möbius Sync's 3.8. Strongbox also leads on review sentiment (84% vs 55%) and update cadence (fortnightly vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Strongbox sells 14 in-app purchases, starting at $2.99 per month and Möbius Sync sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Strongbox holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Strongbox has 4.1K ratings behind it against 140, so its average is the more settled of the two. Written reviews point the same way: 84% of Strongbox's written reviews are positive against 55% of Möbius Sync's.

Strongbox ships an update fortnightly, Möbius Sync every 2 months. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Strongbox | Möbius Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (4.1K ratings)](https://appshunter.io/ios/app/strongbox-password-manager/id897283731/reviews)** | [3.8 (140 ratings)](https://appshunter.io/ios/app/mobius-sync/id1539203216/reviews) |
| Number of ratings | **4.1K** | 140 |
| Positive reviews | **83.7% of reviews** | 55.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 145 MB | 23 MB |
| Requires iOS | 15.0 | **14.1** |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phoebe Code Limited](https://appshunter.io/developer/897283734) | [Pickup Infinity Limited](https://appshunter.io/developer/1118833408) |

## What reviewers say

### Strongbox

[App page](https://appshunter.io/ios/app/strongbox-password-manager/id897283731)

Securely store and manage all your passwords with one master password. Supports open-source formats and offers advanced security features like biometric unlock and YubiKey protection. Includes password auditing and cloud syncing for easy access.

**Highlights:** Biometric unlock (Face ID/Touch ID), Passkey support, YubiKey protection, Password auditing (Have I Been Pwned?), Cloud syncing (iCloud, Dropbox, Google Drive), Secure password generation, TOTP Two Factor Authentication codes

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Strongbox Pro (Monthly) | $2.99 | per month |
| Monthly Tip | $2.99 | per month |
| Strongbox Pro (Yearly) | $19.99 | per year |
| Strongbox Pro (Yearly) | $19.99 | per year |
| Yearly Tip | $19.99 | per year |
| Strongbox Pro (Yearly) | $24.99 | per year |
| Strongbox Pro (Yearly) | $24.99 | per year |
| Strongbox Pro (Yearly) | $24.99 | per year |
| Little Tip | $4.99 | one-time |
| Small Tip | $9.99 | one-time |
| Medium Tip | $19.99 | one-time |
| Large Tip | $99.99 | one-time |
| Strongbox Pro (Lifetime) | $99.99 | one-time |
| Huge Tip | $199.99 | one-time |

**What reviewers like**

- 🚀 Seamless integration with iOS
- 🔒 Highly secure with end-to-end encryption
- 👍 Intuitive and user-friendly interface
- 🔒 Open-source and transparent
- 🚀 Reliable and stable performance

**What reviewers complain about**

- 💰 Paid features can be expensive for some users
- 🐛 Occasional syncing and compatibility issues
- 💰 Lifetime license cost may be prohibitive
- 🐛 Bugs and crashes reported by some users

**Reported bugs**

- Crashes when using certain iOS versions
- Issues with database syncing and corruption

**Requested features**

- Ability to create custom templates and fields
- Improved organization and search functionality
- Tighter integration with Apple Keychain
- Support for more cloud storage providers


### Möbius Sync

[App page](https://appshunter.io/ios/app/mobius-sync/id1539203216)

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:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited file sync | $4.99 | one-time |

**What reviewers like**

- ✅ 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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- 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

**Requested features**

- 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


## Frequently asked questions

### Is Strongbox free?

Strongbox is free to download, with in-app purchases available.

### Is Möbius Sync free?

Möbius Sync is free to download, with in-app purchases available.

### Which has better reviews, Strongbox or Möbius Sync?

Strongbox is rated higher. Strongbox averages 4.7 out of 5 from 4.1K ratings, while Möbius Sync averages 3.8 from 140 ratings.

### Do Strongbox or Möbius Sync have ads?

Neither Strongbox nor Möbius Sync shows ads.

### Which is updated more often, Strongbox or Möbius Sync?

Strongbox ships an update fortnightly, and Möbius Sync every 2 months. Most recently, Strongbox was updated on October 14, 2026 and Möbius Sync on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*