Comparison

Möbius Sync vs Kuma

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

Head to head
About

Möbius Sync

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
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: 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; or 3. (PAID featured) iOS Photo Library folders can be exported to other devices send-only. 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

Kuma

Features
Read full description

Kuma Status — Are your systems healthy? Find out in under 3 seconds. Kuma Status is a premium mobile app built to monitor your public Uptime Kuma status pages. No administration, no complexity — just the essentials to know at a glance whether your services are up. WHY KUMA STATUS? • Direct & private — Your phone connects straight to your Uptime Kuma instances. No intermediate servers, no telemetry, no data collection. • Credential-free — The app only accesses public status page APIs. No admin passwords or tokens are ever stored on your device. • Home screen widget — A beautiful Material 3 widget shows your favorite instance's real-time health and last check time. • Smart alerts — Get a local notification the moment a service goes down or recovers, including the outage duration. • Offline support — The last known state stays visible even without a connection, with a clear warning banner. • Self-signed certificates — Works with local instances using a custom TLS certificate, with latency measurement. • Demo mode — Pre-loaded simulated environments (Homelab and Production) to try the app instantly. BUILT FOR HOMELABBERS AND TEAMS Whether you run a NAS at home or a fleet of production servers, Kuma Status gives you peace of mind at a glance. Kuma Status is a third-party client and is not affiliated with the official Uptime Kuma project.

Screenshots

Möbius Sync1 screens
Kuma4 screens

Verdict

The call

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.

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 Kuma sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Möbius Sync versus Kuma: the parameters behind the verdict, then further details
ParameterMöbius SyncKuma
PriceFreeFree
Rating3.8 (142 ratings) — better—
Positive reviews54.3% of reviews—
Number of ratings142 — better—
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size35 MB37 MB
Age rating4+4+
DeveloperPickup Infinity LimitedTheo Vankoekelberg

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

Kuma

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Möbius Sync

One-time1
  • Unlimited file sync$4.99
1 purchases

Kuma

One-time1
  • Premium Lifetime$3.99

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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