Privacy Policy

Effective 24 October 2026

In short

The developer of Good Eye does not collect, sell or share any personal data. There are no accounts to create, no ads, and no third-party analytics or trackers, and the app never asks for access to things like your location, camera or contacts. The game sends two things over the internet: your results, without your name or any account, to the developer's own server, so that it can tell you where you stand among all players (see Your results); and, only if you chose to sign in to Google Play Games from the results screen, your score to the Google Play Games leaderboard. Google Play Games then also sends Google some diagnostic data of its own; see Deleting your data.

What stays on your device

To remember your settings and progress between sessions, the game saves a few values in the app's storage on your own device:

• your unit choice (millimetres or inches) and your language,
• your screen calibration (pixels per millimetre),
• your best scores, your daily challenge results, your statistics (how far off each guess was) and your last answer, so the next round starts from it,
• whether Good Eye Pro is unlocked on this device.

These values never leave your device. You can delete them at any time by clearing the app's storage or uninstalling the app.

To start players in the United States and the United Kingdom in inches, the app reads the country code of your SIM card or mobile network (for example "us"). It is used on your device for that choice, and from version 2.2.4 it is also sent with your anonymous results (see Your results), so that the developer can see which countries the players come from. It is a two-letter country code, not a location. Reading it needs no permission.

Your results

So that the game can tell you how your eye compares with everyone else's, it sends each finished run and daily challenge to the developer's server (www.good-eye.app): the score, the level reached, the number of rounds, your average error, the day's challenge number and your streak, together with the app version, the game's language and the country code of your SIM card. Once a day it also sends a note that the game was opened, and it sends a note when the free levels are cleared or when Pro is unlocked. From these the developer sees how many people play and how far they get, and the server answers with where your result stands among all players.

These results carry no name, e-mail, account, advertising ID or device ID. They are tied to a random identifier that the game makes up on your device the first time it runs, which identifies nothing but a copy of the game; it lets the server keep one best score per player and count how many players come back. The developer cannot connect it to you. The data is kept on servers run by Vercel Inc. and Upstash Inc. in the European Union, and is not shared with anyone else.

Clearing the app's storage or uninstalling the app deletes the identifier from your device; the game will make a new one, and the old results can no longer be connected to anything.

Reminders

After your first finished daily challenge, the app can show a notification in the evening when the day's challenge is still waiting. It asks for permission once, and you can switch the reminder off at any time in your phone's notification settings. Reminders are made on your device; nothing is sent to show them.

Leaderboard (Google Play Games)

Signing in is optional: the game offers it on the results screen and starts Google Play Games only if you accept. Once you are signed in, the score of each finished run is sent to a Good Eye leaderboard run by Google, which keeps your best one. The game then asks Google where your best score stands among all players and shows it as a percentage. Google handles this under its own terms and privacy policy; who can see your Play Games profile and scores is set in your Play Games settings.

The developer can see the leaderboard in Google Play Console, under your Play Games name, but receives no other information about you. You can delete your Play Games data, including your scores, from your Play Games profile or at myaccount.google.com. If you do not use Google Play Games, nothing is sent.

Deleting your data

The developer of Good Eye (FredDelacroix) keeps no data that identifies you, so there is nothing about you to delete on the developer's side; the anonymous results described under Your results stay in the overall statistics, as no one can tell which are yours. Your Good Eye data is in two places, and you can delete it yourself:

• On your phone. Open Settings → Apps → Good Eye → Storage and tap Clear storage, or uninstall the app. This deletes your settings, calibration, scores, daily results, statistics and the random identifier straight away. A Good Eye Pro purchase stays with your Google account, so Pro comes back if you install the game again.
• At Google, if you used the leaderboard. Google Play Games keeps your Play Games name, player ID and Good Eye scores, and the Play Games software sends Google some diagnostic data. To delete them, open the Google Play Store app, tap your profile icon, then Settings → General → Play Games profile → Privacy and settings → Delete profile and game data, and under "Delete individual game data" delete Good Eye. Your scores leave the leaderboard. Google keeps or deletes any remaining data as its privacy policy describes. See Google's instructions.

If you need help, write to freddelacroix@pm.me.

Purchases

Good Eye Pro and tips are sold through Google Play. Google handles the payment under its own terms and privacy policy. The developer receives no payment details from it; the app only receives Google's confirmation that a purchase is valid, and keeps it on your device.

A coupon code you type in the app is checked on your device or against the offers in Google Play. It is not sent to the developer.

To sell through Google Play, the app includes Google's Play Billing library, which talks to the Google Play Store app on your phone. Google may receive technical data from it under Google's privacy policy.

This website

This page is served by Vercel Inc. Like any web server, it may process technical data such as your IP address and request times, briefly and only to deliver the page and keep the service secure. See Vercel's privacy policy.

Children

Good Eye is suitable for all ages. The developer collects no personal information from anyone, including children: results are anonymous, and the leaderboard works only through a player's own Google Play Games account.

Changes

If this policy changes, the new version will be published on this page with a new effective date.

Contact

Questions about this policy: freddelacroix@pm.me