Comparison

Synctrain vs OneSync

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

Head to head
About

Synctrain

Securely synchronize files and folders between devices running Syncthing. Stream audio and video directly from other devices. All changes, including deletions, are mirrored across your connected devices.

Highlights
  • Secure file synchronization
  • Full folder or specific file syncing
  • Audio and video streaming
  • Cross-device changes mirrored
  • Integrates with iOS Files app
Features
Read full description

With Synctrain you can securely synchronize files with other devices that have Syncthing installed. You can choose to synchronize full folders, or choose specific files. With Synctrain you can also stream audio and video files from other devices. When you synchronize files, all changes, including deleting files, also happen on your other devices. Do not use Synctrain for back-up purposes, and always keep a back-up of your data. You decide with which devices you share which files. This also means the app makers cannot help you access or recover any lost files. This app is powered by Syncthing. This app is however not associated with or endorsed by Syncthing nor its developers. Please do not expect support from the Syncthing developers. Instead, contact the maker of this app if you have questions.

About

OneSync

Instantly share files and text between all your devices without needing to sign up. Use QR codes for quick connections and enjoy secure, end-to-end encrypted transfers. Ideal for personal use or quick transfers to friends.

Highlights
  • Instant cross-platform file sharing
  • QR code for quick session joining
  • Secure end-to-end encryption
  • No sign-up required
  • Share text and files
Features
Read full description

OneSync sends files and text between your phone, tablet and computer in seconds. No account, no cable, no pairing. HOW IT WORKS 1. Start a session on one device. You get a QR code and a short code. 2. On another device or any web browser (onesync-web.setlog.net), scan the QR code or enter the code. 3. Send files and text. Every device in the session receives them. HIGHLIGHTS • Works across your phone, tablet and computer (web) • No sign-up, no login • Share straight from other apps through the share sheet • Join with a QR code, a code or a link • Files and text are deleted from our server after the session ends • Up to 2 devices per session (10 with Pro) FREE AND PRO Free: files up to 200MB each, sessions up to 1 hour, up to 2 devices, supported by ads. Optionally watch an ad in a session to send files up to 1GB each in that session only. OneSync Pro: files up to 5GB each, sessions up to 24 hours, up to 10 devices, no ads. 7-day free trial for new subscribers. A subscription applies to the platform where you buy it. PRIVACY AND SECURITY Transfers use encrypted connections (HTTPS/TLS). OneSync is not end-to-end encrypted, so please do not share highly sensitive files. SUBSCRIPTION INFORMATION OneSync Pro is an auto-renewing subscription, monthly or yearly, with a 7-day free trial for new subscribers. Payment is charged to your Apple ID account at confirmation of purchase (after the trial ends). The subscription renews automatically unless you cancel at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel any time in Settings > your name > Subscriptions. Any unused part of a free trial is forfeited when you purchase a subscription. The price is shown in the app and the App Store before you subscribe. Terms of Use: https://onesync-web.setlog.net/terms Privacy Policy: https://onesync-web.setlog.net/privacy

Screenshots

Synctrain4 screens
OneSync4 screens

Verdict

The call

The clearest difference is rating: Synctrain at 4.9 against OneSync's 1.0. Synctrain also leads on in-app purchases (none vs 2) and ads (none vs shown). OneSync's advantage is update cadence (every 9 days vs every 6 weeks) and iOS requirement (15.0 vs 17.0). On price, monetization model 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. OneSync sells 2 in-app purchases, starting at $2.99 per month. Synctrain asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Synctrain holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Synctrain has 141 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Synctrain ships an update every 6 weeks, OneSync every 9 days. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
Synctrain versus OneSync: the parameters behind the verdict, then further details
ParameterSynctrainOneSync
PriceFreeFree
Rating4.9 (141 ratings) — better1.0 (1 ratings)
Positive reviews89.5% of reviews—
Number of ratings141 — better1
Update frequencyEvery 6 weeksEvery 9 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size42 MB43 MB
Age rating4+4+
DeveloperT-ShapedJUKI JUNG

Customer experience

Synctrain

All ratings141 ratings
Positive95.7%
Neutral2.1%
Negative2.1%
Written reviews95 reviews
Positive89.5%
Neutral6.3%
Negative4.2%

OneSync

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Synctrain

Reported bugs

2 issues
  • Occasional app crashes
  • Sync delays on some devices

Requested features

2 requests
  • Direct photo/video sync to remote devices
  • Faster initial connection to server

OneSync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Synctrain

No in-app purchases

2 purchases

OneSync

Subscriptions2
  • OneSync Pro Monthly7 Days trial$2.991 Month
  • OneSync Pro Yearly7 Days trial$19.991 Year

Questions

Is Synctrain free?
Synctrain is free to download, with no in-app purchases.
Is OneSync free?
OneSync is free to download, with in-app purchases available.
Which has better reviews, Synctrain or OneSync?
Synctrain is rated higher. Synctrain averages 4.9 out of 5 from 141 ratings, while OneSync averages 1.0 from 1 ratings.
Do Synctrain or OneSync have ads?
OneSync shows ads; Synctrain does not.
Which is updated more often, Synctrain or OneSync?
Synctrain ships an update every 6 weeks, and OneSync every 9 days. Most recently, Synctrain was updated on November 4, 2026 and OneSync on October 30, 2026.

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