Kettro
Daily line puzzle
Connect the numbers with one line. A new puzzle every day, same for everyone.
- Early Access
- Free
- Plays offline
- Android
- Everyone
- No ads
- No in-app purchases
- 8 languages
Kettro grows every week
This game is in Early Access: we plan weekly updates and keep developing it step by step – with new content, polish and your ideas. Your feedback goes straight into the next versions.
or write to hallo@jokerstudios.de
Screenshots
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About Kettro
Languages
- Available in 8 languages in total
- Languages: English, German, Italian, Japanese, Korean, Simplified Chinese, Spanish, Thai
One puzzle. Every day. The same for everyone.
Draw a single continuous line through the grid: start at 1, visit the numbers in ascending order, and fill every cell exactly once. Sounds simple? Walls and tricky routes make sure it doesn't stay that way.
Why Kettro?
🧩 One daily puzzle for everyone – A new puzzle every day, identical worldwide. Compare times with friends.
🔥 Build your streak – Solve daily, extend your streak, beat your best times.
📅 Archive – Catch up on missed days from the last 60 days.
♾️ Endless mode – Unlimited puzzles in three difficulties. Share the seed to challenge friends with the exact same puzzle.
📊 Statistics – Best times, averages, streaks, and a time distribution chart.
📤 Spoiler-free sharing – Share your result as an emoji grid.
Best of all:
✅ Puzzles work fully offline
- No in-app purchases
- No tracking, no data collection
- No third-party ad networks
- Dark mode
- In English and German
A calm, fair puzzle for every day. Nothing more – and that's exactly the point.
Found a bug? Got an idea?
🐞 Report a bug
Something doesn't work the way it should? Tell us briefly what happened – we'll take care of it.
Report a bug💬 Give feedback
What do you like, what are you missing? We read every message and keep improving our games with your feedback.
Send feedbackShare Kettro
Frequently asked questions about Kettro
Is Kettro free?
Yes. Kettro is free on Google Play. There are no in-app purchases.
Does Kettro have ads or in-app purchases?
Google Play lists no ads for Kettro. There are no in-app purchases.
Can I play Kettro offline?
Yes, the puzzles work fully offline.
Which devices can I play Kettro on?
On Android phones and tablets via Google Play.
What is the age rating of Kettro?
Kettro is rated “Everyone” on Google Play.
How do I report a bug in Kettro?
Use the “Report a bug” button on this page or email bug@jokerstudios.de. Your device, Android version and a short description of how the bug happens help us most.
Who made Kettro?
Kettro is made by Joculus Studios, an independent game studio from Germany.
