# Möbius Sync vs Karakeep App

The clearest difference is rating: Karakeep App at 4.6 against Möbius Sync's 3.8. Karakeep App also leads on in-app purchases (none vs 1) and review sentiment (69% vs 55%). Möbius Sync's advantage is ratings volume (140 vs 43) and iOS requirement (14.1 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Möbius Sync sells 1 one-off in-app purchase. Karakeep App asks for nothing beyond the download.

Karakeep App holds the better App Store score, 4.6 against 3.8. Both are backed by a comparable volume of ratings — 140 and 43 respectively. Written reviews point the same way: 55% of Möbius Sync's written reviews are positive against 69% of Karakeep App's.

Möbius Sync ships an update every 2 months, Karakeep App every 6 weeks. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Möbius Sync | Karakeep App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (140 ratings)](https://appshunter.io/ios/app/mobius-sync/id1539203216/reviews) | **[4.6 (43 ratings)](https://appshunter.io/ios/app/karakeep-app/id6479258022/reviews)** |
| Number of ratings | **140** | 43 |
| Positive reviews | 55.0% of reviews | **68.8% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 23 MB | 64 MB |
| Requires iOS | **14.1** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 17+ |
| Developer | [Pickup Infinity Limited](https://appshunter.io/developer/1118833408) | [Mohamed Bassem](https://appshunter.io/developer/1735323299) |

## What reviewers say

### 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


### Karakeep App

[App page](https://appshunter.io/ios/app/karakeep-app/id6479258022)

Effortlessly save links, notes, and images with automatic AI-powered tagging for quick retrieval. Search through all your saved content, including link contents, at blazing fast speeds. Organize your saved items into custom lists and share content from any app.

**Highlights:** Automatic AI tagging, Full-text search, Custom lists, Sharing extension, Save links, notes, and images

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Möbius Sync free?

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

### Is Karakeep App free?

Karakeep App is free to download, with no in-app purchases.

### Which has better reviews, Möbius Sync or Karakeep App?

Karakeep App is rated higher. Möbius Sync averages 3.8 out of 5 from 140 ratings, while Karakeep App averages 4.6 from 43 ratings.

### Do Möbius Sync or Karakeep App have ads?

Neither Möbius Sync nor Karakeep App shows ads.

### Which is updated more often, Möbius Sync or Karakeep App?

Möbius Sync ships an update every 2 months, and Karakeep App every 6 weeks. Most recently, Möbius Sync was updated on September 20, 2026 and Karakeep App on September 21, 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.*