Support

Last updated 31 July 2026

Stuck on a path, or just curious how something works? Here's everything in one place — and a real person is an email away.

Contact

Email us at [email protected] and we'll usually reply within 2 business days. Tell us your device and what happened — a screenshot helps us help you faster.

Frequently asked questions

How do I play?

Visit every dot on the board exactly once, drawing one continuous path without lifting off or crossing back. When the last dot lights up, you've solved it. A new puzzle arrives every day.

Is Tendo free?

Yes — the whole game is free and 100% complete. Every daily puzzle is included with no paywall and no ads, and there are currently no in-app purchases of any kind — nothing to buy, cancel, or refund.

Will there be paid features?

Possibly, later. An optional, purely cosmetic-and-convenience upgrade (Tendo Plus) is planned for a future update. Nothing about it is on sale today; if and when it exists, this page will describe exactly what it costs and how to cancel it. The daily puzzle stays free and complete either way, and Tendo will still show no ads.

Which languages does Tendo support?

Tendo is available in English, 日本語 (Japanese), 繁體中文 (Traditional Chinese), and 简体中文 (Simplified Chinese). The app follows your device language where one of these is set.

Do I need an account?

No. There's no sign-up, no login, and no password. Tendo works straight away using an anonymous device ID stored on your device — so there's nothing to remember and nothing to forget.

How is my data handled?

Tendo keeps it minimal: an anonymous device ID, your country, and your solve scores are sent to our Cloudflare Worker so leaderboards work; crash logs (which you can opt out of) are scrubbed of personal information before reaching our crash reporter. There are no ads and no third-party trackers. The full details are in our Privacy Policy.

How do I delete my data?

You're in control. Follow the steps on our Delete account & data page to remove the data tied to your device.

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