Privacy Policy
For the EcoJar app (io.ecojar.aquarium) · last updated 27 August 2026
EcoJar collects nothing. There is no account, no analytics, no advertising identifier, and the app makes no network request of any kind. The simulation runs entirely on your device.
This policy covers the EcoJar mobile app on iOS and Android, and this website. It does not cover any other app.
Information we collect
None. We do not collect, transmit, store on a server, sell or share any personal information, device identifier, usage statistic, diagnostic report or location.
What the app stores, and where
Your jars, your oxygen history and your settings are written to storage that belongs to this app alone, on your own device. They are never uploaded anywhere, because the app has nothing to upload them to. Deleting the app deletes them.
What we do not do
- No account, no sign-in; no email address is ever asked for.
- No analytics or crash-reporting SDK is bundled in the app.
- No advertising, no advertising identifier (IDFA / GAID), no tracking across apps or sites.
- No third-party service receives anything about you, because nothing leaves the device.
- Nothing is sold or shared, so there is nothing to opt out of.
Children
EcoJar is safe for children for a simple reason: it collects no personal information from anybody, of any age. It contains no advertising, no in-app purchases, no chat and no user-to-user communication of any kind.
Links out of the app
The About screen has a small number of links, including this page. Opening one hands you over to your own browser. Anything that happens after that is between you and the site you land on, and this policy no longer applies.
This website
This site is static. It sets no cookies, runs no analytics and loads nothing from a third-party server — every font, image and stylesheet is served from this domain. Our hosting provider may keep ordinary server logs, which we do not read, join to anything, or use to identify anyone.
Your rights
Rights such as access, correction, deletion and portability exist so that you can reach data somebody else is holding about you. We are not holding any. The only copy of your data is the one on your device, which you already control completely: delete a jar inside the app, or delete the app. If you would like this confirmed in writing, write to us and we will confirm it.
If this ever changes
If a future version of EcoJar starts collecting anything at all, this page will say so before that version ships, and the change will be named in the app's release notes. We will not quietly widen it.
Contact
Kunliang Wu · support@ecojar.io
Questions about this policy are answered by the person who wrote the app.