Comparison

Synctrain vs Onyx Focus

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 your devices. Stream audio and video directly from other devices. Manage file sharing permissions to control access to your data.

Highlights
  • Secure file synchronization
  • Full folder synchronization
  • Specific file selection
  • Audio and video streaming
  • Cross-device file mirroring
  • Customizable sharing permissions
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

Onyx Focus

Features
Read full description

Every app blocker lets you cheat. You delete it, or tap "ignore for today", and you're back in the feed. Onyx is the one you can't. Monk mode has no stop button and freezes your app list, so you can't delete your way out until the timer ends. Pick your apps and websites once, then block them right now, on a weekly schedule, or in Pomodoro rounds. When you open a blocked app, a calm shield stands in the way and sends you back to what matters. BLOCK NOW Choose a duration from 15 minutes to 10 hours and start. The apps stay blocked until the timer runs out. Monk mode makes it strict: no stopping early, no deleting apps, until it ends. SCHEDULES Workday, Night, Weekend, or your own days and hours, overnight included. Onyx blocks automatically every week, even when the app is closed. POMODORO Focus in rounds, rest in between. Apps are blocked while you work and free on your breaks, with a notification at every switch. ALWAYS ALLOWED The apps you really need stay usable, even inside a blocked category. PRIVATE BY DESIGN No account, no server, no tracking. Everything runs on your iPhone through the Screen Time system built into iOS. Onyx cannot even see which apps you chose. FAIR PRICE Try everything free for 7 days. Then one fair yearly price, or pay once and keep it forever. Cancel anytime in your Apple ID settings. Onyx needs the Screen Time permission, which iOS asks for on first launch. It blocks apps on this iPhone, for you, not for managing someone else's device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://onyxfocus.app/privacy

Screenshots

Synctrain4 screens
Onyx Focus4 screens

Verdict

The call

The clearest difference is in-app purchases: Synctrain at none against Onyx Focus's 3. Synctrain also leads on device support (3 vs 1). Onyx Focus's advantage is update cadence (every 2 days vs every 6 weeks). On price, ads and iOS requirement 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. Onyx Focus sells 3 in-app purchases, starting at $4.99 per month. Synctrain asks for nothing beyond the download.

UpkeepUpdate frequency

Synctrain ships an update every 6 weeks, Onyx Focus every 2 days. The most recent releases landed on September 28, 2026 and September 10, 2026 respectively.

Scorecard3 real differences · 7 level
Synctrain versus Onyx Focus: the parameters behind the verdict, then further details
ParameterSynctrainOnyx Focus
PriceFreeFree
Rating4.9 (123 ratings) — better—
Positive reviews89.5% of reviews—
Number of ratings123 — better—
Update frequencyEvery 6 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size33 MB2 MB
Age rating4+4+
DeveloperT-ShapedRamona Furter

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

Onyx Focus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Synctrain

No in-app purchases

3 purchases

Onyx Focus

Subscriptions2
  • Onyx Pro Monthly$4.991 Month
  • Onyx Pro Yearly7 Days trial$24.991 Year
One-time1
  • Onyx Pro Lifetime$99.99

Questions

Is Synctrain free?
Synctrain is free to download, with no in-app purchases.
Is Onyx Focus free?
Onyx Focus is free to download, with in-app purchases available.
Do Synctrain or Onyx Focus have ads?
Neither Synctrain nor Onyx Focus shows ads.
Which is updated more often, Synctrain or Onyx Focus?
Synctrain ships an update every 6 weeks, and Onyx Focus every 2 days. Most recently, Synctrain was updated on September 28, 2026 and Onyx Focus on September 10, 2026.

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