Privacy Policy

One Stroke: Line Draw Puzzle (com.pando.onestrokelinepuzzle) — Last updated: 12 August 2026

1. Overview

One Stroke: Line Draw Puzzle (“the game”) is a free Android puzzle game published by Stronghealth. There is no account, no sign-up and no server of ours. Apart from loading ads, the game sends nothing off your device.

2. Everything runs on your phone

Every puzzle is generated on your device from a seed. Nothing is downloaded while you play, and the game works the same in airplane mode.

Your progress — the level you are on, your daily streak, how many puzzles you have solved at each difficulty, the hints you have used today and your settings — is stored only in the game’s local storage on this device (keys progress.v1 and settings.v1). We do not operate a server that could receive it. Uninstalling the game removes that storage along with your records, and Settings > Reset progress clears it at any time.

3. Information we collect

The game does not collect, store or transmit personal information. We do not operate a server or database holding user data.

4. Third-party services and ads

The game uses one third-party service.

• Google AdMob — used to show ads. No ad is ever shown on the puzzle board. A banner appears on the home screen, on the stats screen and on the finished-puzzle panel. A full screen ad can only appear on leaving a finished puzzle — never during your first three clears, at most once every three clears, and never twice within two minutes. An app open ad may also run on a cold start, though never on your very first run, and there is an optional rewarded video you may choose to watch for three extra hints. Nothing else in the game is sold behind an ad, and every difficulty is available from the start.
  The game requests non-personalized ads only. Even so, for advertising it declares the advertising ID permission (com.google.android.gms.permission.AD_ID), and Google’s Mobile Ads SDK may collect and use the Android advertising ID and related data — such as IP address, app interaction and diagnostic data — in order to serve and measure ads. See Google’s Privacy Policy and How Google uses information from sites or apps that use our services. You can reset or delete your advertising ID under Settings > Privacy > Ads on Android.
  If an ad fails to load, the game simply carries on.

No analytics, crash reporting or push services are used.

5. Permissions

The game requests no permissions that need your consent. It does not ask for the camera, the microphone, location, contacts, photos, files, storage or notifications. Every permission in its manifest is a normal, install-time entry granted without a prompt: internet and network state, the advertising ID (com.google.android.gms.permission.AD_ID), wake lock and the Privacy Sandbox advertising entries declared by the ads library itself, and vibrate, which is what the haptics toggle in Settings drives.

6. Children’s privacy

The game is rated for everyone but is intended for a general audience and is not directed at children. We do not knowingly collect personal information from children.

7. Changes to this policy

This policy may change. Any change will be posted on this page with a new date.

8. Contact

Questions about this policy can be sent to [email protected].