# Möbius Sync vs Kuma

The clearest difference is ads: Möbius Sync at none against Kuma's shown. Möbius Sync also leads on iOS requirement (15.0 vs 18.0). Kuma's advantage is update cadence (every 9 days vs every 2 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Möbius Sync sells 1 one-off in-app purchase and Kuma sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Möbius Sync ships an update every 2 months, Kuma every 9 days. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Möbius Sync | Kuma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (142 ratings)](https://appshunter.io/ios/app/mobius-sync/id1539203216/reviews)** | — |
| Number of ratings | **142** | — |
| Positive reviews | 54.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 37 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pickup Infinity Limited](https://appshunter.io/developer/1118833408) | [Theo Vankoekelberg](https://appshunter.io/developer/1873914246) |

## What reviewers say

### Möbius Sync

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

Sync files between your iOS devices and other Syncthing-compatible platforms without relying on cloud services. Access files within the app's sandbox or, with a paid upgrade, integrate with other apps' sandboxes and export photos.

**Highlights:** Peer-to-peer file synchronization, Syncthing engine integration, Sync with other Syncthing devices, Access files via iOS Files app, Paid access to other app sandboxes, Paid export of iOS Photo Library

**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- 🐛 Outdated internal Syncthing version (1.28 vs 2.x)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


### Kuma

[App page](https://appshunter.io/ios/app/kuma-status/id6778313236)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Lifetime | $3.99 | one-time |


## Frequently asked questions

### Is Möbius Sync free?

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

### Is Kuma free?

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

### Do Möbius Sync or Kuma have ads?

Kuma shows ads; Möbius Sync does not.

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

Möbius Sync ships an update every 2 months, and Kuma every 9 days. Most recently, Möbius Sync was updated on November 11, 2026 and Kuma on October 31, 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.*