One Line Train support
Need help with One Line Train, found a bug, or have an idea? Email us and include “One Line Train” in the subject. We do not promise a specific response time.
Report a game issue
- Your device model and operating-system version, plus the game version shown at the bottom of Settings.
- The level number, what you expected, and the steps that caused the problem.
- A screenshot if useful. Remove notifications and other personal information first.
Common questions
How do I play?
Draw one line of track from the depot through every station, then send the train. Some levels have two or three trains, each with its own line.
I'm stuck. What can I do?
Use a hint to light up the next few squares of track, or tap Restart to clear your line and try again.
Is my progress saved?
Yes. Your levels, stars, coins, shop items and best scores are saved on your device automatically. Uninstalling the app deletes them from your device, and we can't restore them for you. Your phone's own backup may keep a copy.
What are coins for?
Earn coins by clearing levels, then spend them in the Shop on train colours, steam, tracks, backdrops and hints. Coins can't be bought.
How do I turn off sound or vibration?
Open Settings in the game and switch Sound or Vibration off.
Why do I see ads?
Ads keep the game free. There are no in-app purchases. Rewarded videos are always your choice, and one of them gives you an hour with no banner or full-screen ads.
Why can't I see a “Watch ad” button?
The button only appears when an ad is ready. Ads need an internet connection and aren't always available, so check your connection or try again later.
How do I change my ad privacy choices?
In the European Economic Area, the UK, and Switzerland, open Settings in the game and tap “Privacy choices”. Elsewhere, use your phone's ad settings (Android: Settings → Google → Ads; iPhone: Settings → Privacy & Security → Apple Advertising, and Tracking).
Privacy requests
Email us with your request. There is no JL Prime account to delete. See our privacy policy for more details.
Updated 9 November 2026