Privacy Policy for Isochrone

Last updated: 17 August 2026

ISOCHRONE ("the game", package com.lukekavenagh.isochrone) is developed and published by Luke Kavenagh ("we", "us"). This policy explains what the game does with information, and what it does not.

The short version: the game has no servers of its own. It does not contain advertising, analytics, or tracking software of any kind. Puzzle progress is stored on your device. The only outside parties involved are Google's own Play Games and Play Billing services, which you can decline and still play.

What we collect ourselves

Nothing. We do not operate a server, we do not have an account system, and no information about you is transmitted to us or stored by us.

What is stored on your device

The game keeps a single save file in its private app storage. It contains only your play state:

• which puzzles you have cleared, and your best score on each
• the piece layouts of solutions you have found, so you can review them
• your total score and the last daily puzzle you played
• whether the full-game unlock has been purchased

This file never leaves your device except through a backup you yourself set up (for example Google's own Android backup, if you have that enabled). It contains no name, no email address, no identifier, and no contact or location data.

You can erase it at any time using RESET PROGRESS on the High Scores screen, or by uninstalling the game.

Google Play Games Services (optional)

If you choose to sign in to Google Play Games, the game uses it for leaderboards and achievements. In that case:

• Google provides the game with your Play Games player ID and display name, and we submit your score so it can appear on the leaderboard.
• The leaderboard itself is operated by Google, not by us. We can read the rankings; we cannot see your Google account, your email address, or anything else attached to it.
• Google's own handling of this data is governed by the Google Privacy Policy.

Signing in is entirely optional. If you decline, every puzzle in the game remains playable and your scores are kept locally; only the global rankings are unavailable.